When it comes to the human brain, we are prone to make mistakes. However, artificial intelligence is sometimes presented to the public as perfect. Do artificial intelligent systems make mistakes?
Anything that exists outside of fiction that can be called AI and is not trivial is not perfect.
- Alexa: creepy laugh - not trivial, but not perfect
- Tic-Tac-Toe / Connect four: perfect algorithms exist, but trivial (you can create a game tree)
The problem is that you didn't bother to define "perfect". What does it mean to be perfect? Natural selection favors living beings that are energy efficient. Remembering everything might be considered perfect, but it is certainly not efficient.
We tend to make mistakes because some skills - especially abstract/mathematical ones or long-term decision making are not supported by natural selection.
Another big group of traits that are not supported by natural selection are health traits that are after the age of reproduction / helping children to grow up. Specifically cancer above the age of 40.