1. (a) There is a finite number of people.
(b) Each committee consists of exactly two people.
(c) Exactly one person is on an odd number of committees.
Answer: This axiomatic system is inconsistent. In fact, we can prove that the first
two axioms imply that the number of people on an odd number of committees must
be even. This is sometimes called the Handshaking Theorem because it is often stated
in the form of pairs of people shaking hands (rather than serving on committees).