Philosophy 10: Introduction to Logic

Winter Quarter 2005. UCSD.

Time: 4:00 - 4:50pm
Room: Solis 107

Instructor: Rick Grush (rick@mind.ucsd.edu -- http://mind.ucsd.edu)
Office Hours: W 2:15-3:45 -- HSS 7038

Short Description ]
Schedule ]
Grades ]
[ Exam Requirements ]
Score Sheets ]
Email Lists ]
[ For some information about this course, including CAPE comments, exam length, and academic integrity, click here ]

 TAs  Sections Office Hours  Office

  Lisa Damm
  ldamm@ucsd.edu

A04 W 6-6:50 York 4080A
A05 W 7-7:50 York 4080A

 M2p-4p

HSS8073

  Andy Beck
  aebeck@ucsd.edu

A01 M 5-5:50 York 4080A
A06 F 2-2:50 Peter 103

 Th11a-1p HSS8037
  Liberty Jaswal
  ljaswal@ucsd.edu

A02 M 6-6:50 York 4080A
A03 M 7-7:50 York 4080A

 Th7:30p-9:30p HSS8029

Short Description:

Content.

This course consists of two parts. In the first part (about 2/3 of the course) we will cover the basics of formal sentential logic, including transaltions into formal notation, truth tables, and proofs. In the second part (about 1/3 of the course), we will study informal reasoning, focusing on ways that it can commonly go wrong. Note that students in this class are expected to complete their own work, both problem sets and exams should represent the student's own work, and not be copied from other students or any other source. Violation of this is plagiarism and constitutes a violation of class and University policy.

Structure.

There are two lectures per week, and one discussion section. Grades are based on exams given in class, and problem sets.

Text and other materials.

The text for the course is Basic Sentential Logic and Informal Fallacies (BSLIF), which is available at UCSD bookstore. This text is brief, containing the minimal basics. It is possible that some students might like more extended discussion of some topics, or more examples. To this end, copies of Patrick Hurley's A Concise Introduction to Logic, as well as the study giude and instructor's manula for Hurley's text, are on reserve in the Central Library.

In addition to these text, there is a logic website for this course, that has additional exercises with solutions.

 

Schedule:

Each session number is followed by the date of the lecture, and then the sections of the text that correspond to the lectures. Problem set due dates are not indicated. Each TA sets the exact due date for problem sets for students in thier section. They can be turned in to your TA during your TA's office hours, during one of your TA's discussion sections, or any other agreed-upon location, so long as they are in before the due date specified. Note that sticking problem sets in MY email box does not constitute turning them in on time. They must be given to your TA.

Session 01 (01.03.05): BSLIF 1.1

Session 02 (01.05.05): BSLIF 1.1, 1.2

Session 03 (01.10.05): BSLIF 2.1, 2.2

Session 04 (01.12.05): BSLIF 2.3, 2.4

Session 05 (01.19.05): BSLIF 2.5.

Session 06 (01.24.05): Midterm One

Session 07 (01.26.05): BSLIF 3.1.

Session 08 (01.31.05): BSLIF 3.2.

Session 09 (02.02.05): BSLIF 3.3.

Session 10 (02.07.04): BSLIF 3.4.

Session 11 (02.09.05): BSLIF 3.5.

Session 12 (02.14.05): Midterm Two

Session 13 (02.16.07): BSLIF 4.1 - 4.4

February 21, President's Day Holiday

Session 14 (02.23.05): BSLIF 4.5 - 5.2.

Session 15 (02.28.05): BSLIF 5.3 - 5.6.

Session 16 (03.02.05): BSLIF 5.7 - 6.2.

Session 17 (03.07.05): BSLIF 6.3 - 6.4.

Session 18 (03.09.05): ???

Final Exam: Tuesday March 15, 3-6pm. Room TBA, probably Solis 107.

 

Grades:

There are 1000 points possible for the course. This is broken down as follows: 200 for each of two midterms exams, for a total of 400. The final is worth 500 points. And the section grade, based on homework, is worth 100 points.

The final exam's 500 points are broken down as follows. 125 will correspond to material from Midterm One. 125 will correspond to material from Midterm 2. The reamining 250 points will cover material covered in the last third of the course: everything after Midterm Two.

Letter grades will not be assigned until after all points are in. The worst-case scenario is that it will be a straight 10% breadkdown: 90%-100% will be A-, A or A+; 80%-89.9% will be B-, B or B+; and so forth. So if you need to get a C-, for example, you should plan on getting at least 700 points out of the 1000 possible. Depending on the class average, the grade cut-offs may be curved downward a bit -- for example one quarter the A- cut-off was 880 points rather than 900. But you should not count on any such curving down. The grade cut-offs will not be curved up, however, meaning that the straight 10% breakddown is the highest that the grade cut-offs will be set.

Special pleading at the end of the course will have no effect. Every quarter a certain number of students who apparently need to pass the class in order to graduate miss the C- cut-off, or the D cut-off. Some of these students are then unable to graduate. If this is your situation then you need to make sure you pass the class. We have office hours and are happy to help if you are having trouble with the material, practice exams are available for you to assess your own level of preparation. I and the TAs are happy to spend time with anyone who needs it to help them get a handle on the material so they can do well on the exams. But it is your responsibility to attend lecture, attend sections, study the material, do homework, and take practice exams, and and come to office hours if you need help. We will NOT adjust grades after they have been assigned, except in cases where an actual error of some sort has been made. See the section below on how to do well in this course for more advice on how to insure that you pass the class. It is no fun being unable to graduate because you missed a C- by 4 points out of 1000, and I don't like having to be the one who fills out the D or F on the grade sheet. So do us both a favor and be certain that you learn the material well enough to pass the class. I apologize for the negative tone of this paragraph, but I take it that the vast majority of the students in this class who work hard and study the material do so on the assumption that the grade they earn on that basis means something. They are depending on me to not do things like give some other student who doesn't understand the material as well the same grade just because this other student did some lobbying after the quarter was over. Every student's grade is determined by the points they receive, including those who miss a grade cut-off by 1 point out of 1000. I am spending so much time on this topic because, as I said, I don't like being the one who fills out the F or D on the grade sheet for a student who was planning to graduate, has a job lined up, etc. So please, study, attend lecture, do the practice exams, go to section and ask question if there is stuff you don't understand. See me or the TAs is you need help. Don't take a risk by not studying, skipping lectures or homework, and try to estimate how much you can slack off and 'probably' still pass.

No make-up exams will be given. If you miss a midterm exam for a legitimate reason, such as serious medical injury or illness, then the points will be made up in the following way: The final exam has sections that correspond to material from Midterm One and Midterm Two -- each worth 125 points. If a student misses a midterm exam for a legitimate reason, then the points that the student earns on that section of the final that corresponds to the missed exam will be multiplied by 1.6, and that number used for the student's exam score (because 125 x 1.6 = 200). Legitimate reasons include serious illness with a doctor's note. Personal travel plans that conflict with the schedule, forgetting about the exam, etc., are not legitimate excuses. In order to have the option of making these points up in this way (for legitimate excuses), I must be informed either before the missed exam, or within 24 hours after the exam, of the situation.

In order to help accomodate students with scheduling issues, an optional early version of the final will be given, usually 4 - 7 days before the normally scheduled exam, depending on the final exam schedule. Exact place and time willl be annonced in class and on the email lists. You can take either the early final, or the regularly scheduled final, but not both. They are identical in format, points, length, and time allowed.

Problem sets are due when your TA says they are due. These due data will be announced by your TA in sections and on the corresponding email lists.No late problem sets will be accepted, no exceptions. If you aren't sure wether you will be adding the class, I recommed to still do the problem sets, since adding the class late does not constitute a reason to turn them in late. For your final grade we will replace your worst problem set score with your best problem set score, which effectively means that you can miss or tank one problem set, so long as you do the rest. This is the mechanism that is intended to cover you in case you are forced by circumstances to be unable to turn in one of the problem sets, so don't just skip a problem set early in the quarter thinking that it won't matter.

Requirements for taking the exams:

No notes or books or other materials are allowed during the exam. You will need only one or more blue books, and one or more writing implements. The exam will have a sheet for recording your multiple choice answers. All work, and solutions to problems that are not multiple choice, must be written in the blue books. The exam should be placed inside the blue book and turned in with it when you turn your exam in. Time is a factor in the exams. In order to ensure that everyone has the same amount of time, the following procedures are implemented. The first page of the exam is the multiple choice answer sheet. When we hand out the exams, do not turn that page and start working on the exam until we say so, which we will do when everyone has a copy of the exam. This will ensure that everyone has the same start time. I will keep time, and will write on the board rough estimates of how much time is left. I will announce when 5 minutes are left, then 2, then 1, then 30 seconds, then 10 seconds, and will count down from 5 to 0. There will be a number of boxes in which you must turn in your exam. Any of the designated boxes is fine. When the announced time reaches zero, lids are placed on the boxes, and any exam not in the box at that time will have 10 points deducted, no exceptions. This will ensure that everyone has the same end time. But let me be perfectly clear: the lids will be placed on the boxes simultaneously with the beginning of my pronunciation of the 'z' in zero. If your exam is not entirely in the box at that instant, then it will have 10 points deducted. So, for example, if any part of your hand is still touching any part of the paper on your blue book when the 'z' in 'zero' begins to sound, then you've just lost 10 points. I belabor this because every quarter, especially for the first exam, there are anywhere from 1 to 4 students who are standing near one of the designated boxes, and when they hear 'zero' and see the lid go on, reach out to stick their exam in, apparently thinking that being within a second or two of the announcement of 'zero' is good enough. And then they are surprised to see me take the exam and put it in the 10-points-off stack. My recommendation would be to practice enough so that you are turning in your exam with 5 or 10 minutes to go (as a number of students do); failing that, even if there are questions unanswered, I would recommend having your exam in the box before I start the 10 second countdown. If there happens to be a crowd at the box you are at such that you can't get it in, then this is not an excuse. Hopefuly that won't happen, but it is your responsibility to get your exam in the box before the lid goes on. The point of this procedure is fairness. Unless there is some absolutely clear and strictly enforced deadline, there will be some students who continue to work on their exam after the end of time has been announced, and students who did turn their exam in when time was up will then rightfully feel cheated, since those students who continued to work will have had more time on the exam. The only way to guarantee fairness is for there to be a clear and mercilessly enforced deadline. I apologize for the heavy-handed procedure on this, but we do it not because we like being heavy-handed, but because ensuring that everyone is treated absolutely fairly is a high priority for us.

 

Score Sheets

Links to score sheets for each section are below. These will be updated after each exam. Scores are listed by a coded version of your student ID number in order to protect privacy, as per University regulations. In order to determine what your coded ID number is, do the following. Take your student ID number. This will be something like a letter followed by 8 digits, like "A01234567". Remove the letter and the first digit, and you're left with a string of 7 digits, like "1234567". Take the first four digits, and treat this as a 4 digit number (something between 0000 and 9999); and take the last four digits and treat this like another 4-digit number. In the example above, they would be "1234" and "4567". Add these two numbers together, for example: 1234 + 4567 = 5801. If the number you get is 5 digits, remove the first digit to make it 4 digits long; if it is 4, then keep it at 4 digits. This is your coded ID number. To see another example: If your student ID is "A05367921", you drop the first letter and number: "5367921"; then take the first 4 digits: "5367"; and the last 4 digits "7921"; add them together: 5367+7921=13288. If the result is 5 digits, remove the first digit: "3288". If you cannot find your row on the score sheet, first check other score sheets, especially if you changed sections at some point in the quarter. If you still have trouble, email me with your name, section, and ID number.

Score Sheets

Section a01
Section a02
Section a03
Section a04
Section a05
Section a06

 


Email List:

NOTE: These email lists will not be active until January 2005. If you subscribe earlier than January, you will need to subscribe again.

Email List: There are email distribution lists for this course, one for each section. IT IS A COURSE REQUIREMENT THAT YOU IMMEDIATELY SUBSCRIBE TO THE EMAIL LIST FOR YOUR SECTION, AND THAT YOU MAINTAIN YOUR EMAIL ACCOUNT SO THAT IT CAN RECIEVE EMAIL FROM THIS LIST. You can always unsubscribe later if you drop the course or change sections. The purpose of the list is to allow me and the TAs to distribute information regarding due dates for assignments, changes of schedule, etc. Some of this information is crucial, and some of it will be distributed early on. To subscribe, you simply need to send a message to the following address (the message must be sent from the account that you want to be subscribed):

If you are in section a01, send a message to
logic-a01-sub@mind.ucsd.edu 

If you are in section a02, send a message to
logic-a02-sub@mind.ucsd.edu 

If you are in section a03, send a message to
logic-a03-sub@mind.ucsd.edu

If you are in section a04, send a message to
logic-a04-sub@mind.ucsd.edu 

If you are in section a05, send a message to
logic-a05-sub@mind.ucsd.edu 

If you are in section a06, send a message to
logic-a06-sub@mind.ucsd.edu

The subject line and any content in the message are ignored. You only need to send the message to the appropriate address from the account that you want to be subscribed.



How to do well in this course:

Attend the lectures, and read the corresponding chapters of the text before the lecture. Attend the discussion sections, and do all homework assigned by the TA. Use the homework, and other non-assigned exercises (in the text or on the website) to determine for yourself how well you have mastered the material. If you need additional help, ask your TA or myself. We have office hours. The earilier you get clear on some issue that is giving you trouble, the better it will be for everybody. You can also make use of the texts on reserve at HSS, which have more examples and more discussion.

For each exam, 2 practice exams are available in the text. I recommend that before the actual exam, you administer one of the exams to yourself, giving yourself only 45 minutes. Then grade your exam (answers will be emailed out on the email lists). This will allow you to find what material, if any, you need to work on some more. Consult myself or the TA, or simply do more excercises of the type you need to improve on until you feel you have mastered this material. Repeat the proceedure with the second practice exam.

This will be a very manageable class IF you simply keep up with the material, regularly practice by doing exercises, and ask for help as soon as you need it.

Many students end up getting grades much worse than they expect because they do not follow the above advice. The material looks easy when you read through it or watch someone else work a proof or truth table, and many students then think "That looks easy, I'll be able to do that on a test." But as some students learn the hard way, watching someone do it is a lot easier than doing it yourself. Furthermore, the exams are long. Purposefully long. Most students do not finish them. The only way to get to the point where you can do the problems quickly and accurately is to do a lot of practice. [Amazingly, I give people this advice every time I teach this class, and every time a large chunk of students still fall into exactly these traps.]