Overestimate

People often misjudge their abilities. Those with less than average abilities overestimate their true abilities. Those with higher don’t realize how much higher. Stupid people are too stupid to know how stupid they are. Some smart people wrongly assume that most others can do what they can.

We are prone to overestimate how much we understand about the world and to underestimate the role of chance in events.

Thinking, Fast and Slow by Kahneman