Andre first became suspicious of his roommate's honesty while trying to account for his own missing billfold. Although Andre later recalled that he had left his billfold in the glove compartment of his own car, his newly formed doubt about his roommate's honesty remained as strong as ever. Andre's irrational suspicion of his roommate best illustrates:

Which best describes why it is necessary to evaluate a solution?

How has the elimination of trade barriers affected the movement of goods among member countries of the european union? a. member countries are able to produce all the goods they need. b. goods can move freely among member countries. c. member countries no longer need to trade with countries outside the eu. d. larger countries are able to import more goods than smaller ones.

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.