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I have this question as extra credit for my chemistry class. Im passed the deadline for EC so i don't even care about that, the answer is just driving me crazy! No one else has figured it out that i know of. Here's the logic problem:

EC: Science Friction

The science department at Rasputin High School is brimming with controversy. Each teacher is currently angry with a different teacher for a different reason ( in one case, because another teacher told a joke at his or her expense). Discover each person's subject, the teacher with whom he or she is angry, and why.

1. No pair of teachers is angry at each other.


2. The chemistry teacher is angry with a man.


3. Mr. Hogarth is angry because another teacher commented on his weight.


4. The physics teacher is angry with Ms. Watson.


5. A woman is angry with another teacher who received a better class schedule.


6. A man is angry at Ms. Kessler, who teaches computers.


7. The person who is angry because another teacher scratched his or her car in the parking lot doesn't teach chemistry or physics.


8. Mr. Forbes doesn't teach biology.

Solution:

Chemistry teacher is Ms Watson, and is angry at Mr Hogarth (class schedules)

Physics teacher is Mr Forbes, and is angry at Ms Watson (joke)

Biology teacher is Mr Hogarth, and is angry at Ms Kessler (weight comment)

Computers teacher is Ms Kessler, and is angry at Mr Forbes (car scratched)

Logic:

Physics teacher angry at Ms Watson, a female (#4)

A man is angry at Ms Kessler, a female, who teaches computers. (#6)

Chemistry teacher is angry at a man. (#2)

Two of chemistry, physics, and biology are taught by men. (#6)

Physics teacher is not Ms Watson, so must be male. (#4)

Biology teacher is not Mr Forbes (#8)

The man who is not the Physics teacher is angry at Ms Kessler (#4, #2, #6)

(So male teachers are angry at Ms Kessler and Ms Watson)

Chemistry teacher cannot be male: angry at a man (#2) and both men are angry at females.

So Physics and Biology teachers are male, Chemistry and Computers are female. (Elimination)

Physics is Mr Forbes, Biology is Mr Hogarth (#8, #3)

Chemistry is Ms Watson, Computers is Ms Kessler (#4, #6)

Mr Forbes is angry at Ms Watson. (#4)

Mr Hogarth is angry at Ms Kessler. (#6)

Ms Watson is angry at Mr Hogarth (#2, #1)

Ms Kessler is angry at Mr Forbes (Elimination)

Mr Hogarth is angry because of the comment about his weight (#3)

Ms Kessler is angry because her car was scratched (#7, elimination)

Ms Watson is angry because of class schedules (#5, elimination)

Mr Forbes is angry because of a joke (Elimination)

Hint:

Try a grid like this: (link to online solver)

chemistry       Ms. Watson     angry at Mr. Hogarth       class sched.

physics         Mr. Forbes     angry at Ms. Watson        joke

biology         Mr. Hogarth    angry at Ms. Kessler       weigh

computers       Ms. Kessler    angry at Mr. Forbes        car 

I see 4 teachers, 4 subjects, but the "reasons why" are the goofed up part. One of the "reasons why" is in the instructions. The problem is that this is not a puzzle, but a trick of the person who devised the assignment to see if those given the assignment would "deduce" that 4 "reasons why" do exist, but not all four are found in the logical place expected to appear, which is in the numbered list. Assuming there was no mistake made in putting the assignment together, the unaware student struggles to find the fourth reason where it ought to be, in the list, which is where the other 3 "reasons why" are found. The trick is that the student reads the "joke" in the instructions as an example of a reason why, or, could confuse the joke with the comment about Hogarth's weight. The error was on the part of the teacher, who would have not lost the impact of the assignment had he/she realized that the joke and weight comment could be confused with each other, and a fourth reason why, even if in the instructions, should have been more distinct. In short, it was a test, not a puzzle, but needs a little more tweeking for the student to ultimately make the logical connection with the 4th reason why. Joke and comment are little too vague, and the "joke" of the test is funny only to the one who knows the punchline. Otherwise, if you want to get back at the teacher, have him/her figure out who the student is mad at and the reason why.