Three pets, a dog, a cat, and a rabbit, have different colors: brown, white, and black. The dog is not black. The cat is white. What color is the rabbit?
A committee of four members is to be formed from the following candidates: P, Q, R, S, and T. The selection criteria are: 1) P and Q cannot be selected together. 2) R must be included if S is included. 3) T can be included only if P is not included. Which of the following combinations is valid?
In a group of five friends: Alex, Brian, Charlie, David, and Edward, the following conditions apply: 1) Alex is taller than Brian but shorter than Charlie. 2) David is shorter than Edward. 3) Charlie is not the tallest. Who is the tallest among them?