An implicit detail is a

Use the adjective implicit when you mean that something is understood but not clearly stated ... But the adjective implicit also means "complete without any doubt," so we can say that we have implicit trust or confidence in someone.

Implicit detail is a suggested piece of information about someone or something.

Explanation:

This can be explained by providing the meanings of "implicit" and "details" as follows:

1. Implicit: This simply means something that is implied, suggested, not stated, or not communicated directly, but it is known in what is expressed. Implicit can also mean something that not influenced by any uncertainty and it is without any doubt.

2. Details: This means a piece of information or a specific fact about someone or something.

Therefore, implicit detail is a suggested piece of information about someone or something.