Humans are very good at making algorithms work eventually.
Sometimes guessing is the best you can do. In the real world we guess all the time and it serves us well.
The brain has a good error rate. But the point is you can function with that error rate. Animals do a lot of guesswork.
Human beings from a mathematical perspective are fairly limited. Two and three dimensions maybe five and we're OK.
There is no such thing as zero uncertainty.