some kind of mistake

I’m only human
Of flesh and blood, I’m made
Human
Born to make mistakes*

To err is human they say,

we fail to fail

“I have not failed. I’ve just found 10,000 ways that won’t work.” – Thomas A. Edison

“Success is most often achieved by those who don’t know that failure is inevitable.” – Coco Chanel

I hate being wrong. Why is it that one of the most powerful teaching devices (if not the most) is shunned or not permitted in architecture?