Answer:
This is called "functional fixedness".
Explanation:
"Functional fixedness" is a type of cognitive bias in which a person who has always known an object to be used for one particular purpose, believes it can only be used for that purpose and nothing else.
As such, the person is not creative in the use of that object.
For example, a phone screen, in the absence of a mirror, may be used as one. However, someone exhibiting functional fixedness may overlook this possibility.
