Answer:
a heuristic
Step-by-step explanation:
A heuristic refers to the mental shortcut people tend to make while making a quick decision. When we faced a situation instead of looking at all the information our mind relate to similar conditions for a faster decision making process. Although they are useful some times, on the other hand, it can lead to false judgment and cognitive bias.
As per the question, sticking to the first question instead of looking at the rational side of the question is a classic example of a Heuristic.