Final answer:
Hindsight bias is the tendency to believe that an event was predictable or that we knew it would happen after it has already occurred, even though it may not have been predictable at all.
Step-by-step explanation:
The concept that best fits the description is hindsight bias. Hindsight bias is the tendency to believe that an event was predictable or that we knew it would happen after it has already occurred, even though it may not have been predictable at all. This bias is related to our natural desire to make sense of the world and find patterns, even where they might not exist. For example, if someone wins the lottery, we might say, "I knew they would win, it was so obvious." However, in reality, the outcome was based on chance.