Problem 1. [24 points]

Question

Translate the following sentences from English to predicate logic. The domain that you are
working over is X, the set of people. You may use the functions S(x), meaning that “x has
been a student of 6.042,” A(x), meaning that “x has gotten an ‘A’ in 6.042,” T(x), meaning
that “x is a TA of 6.042,” and E(x, y), meaning that “x and y are the same person.”
(a) [6 pts] There are people who have taken 6.042 and have gotten A’s in 6.042
(b) [6 pts] All people who are 6.042 TA’s and have taken 6.042 got A’s in 6.042
(c) [6 pts] There are no people who are 6.042 TA’s who did not get A’s in 6.042.
(d) [6 pts] There are at least three people who are TA’s in 6.042 and have not taken 6.042

Answer 1

(a) ∃x | A(x)
any ideas on the others?

Answer 2

On my side i think the answer is the same as yours