Answer:
Availability.
Step-by-step explanation:
This is explained as the ability to process information that comes to the mind immediately trying to think lesser or neglect that which is not yet in mind. That was what Dave, could not phatom in the above description. This phenomenon ends up making people often judge the likelihood of an event, or frequency of its occurrence subtly with which instances and scenarios come easily to mind.
In business dealings for example, an over-estimation can be the likelihood of attacks by sharks or list accidents. Also, some smokers may see one elderly heavy smoker and exaggerate the likely healthy life expectancy of this group.