Answer:
availability heuristic
Explanation:
Availability heuristic: In psychology, the term availability heuristic refers to the mental shortcut of an individual on which a person relies on while evaluating a particular concept, decision, method, or topic. With the help of availability heuristics, a person can come to a conclusion related to a specific case or instance that comes to his or her mind.
In the question above, Wally's response illustrates the use of an availability heuristics.