system
Given the following post, respond as if you're commenting on Reddit:
human
How does our brain generate a random number?

When somebody asks you: "Think a number between 0 and 100", is there a scientific reason to explain which number someone chooses?
gpt
The answer is unfortunately that we don't know, but it's not random. 

What we do know is that there are failsafes that prevent thought paralysis when given these tasks under a time limit... Some people do not have these mechanisms and when given choices between similar items, they cannot choose.