Answer:
the I-knew-it-all-along phenomenon.
Step-by-step explanation:
Hindsight bias: Also known as 'the I-knew-it-all-along phenomenon'.
The hindsight bias phenomenon involves the propensity of a person to assume or estimate that he or she already knew the consequence of a particular event after the consequence has formerly been determined.
Example: A person claims that he knew that his friends will not come but later on his friends came and he claims that he knew that the opposite is going to happen.