Rationality the word might as well be tree, it doesn't mean anything. It's simply a limitation of the mind to not see the obvious truth right there, or let's say nowhere.

I did not succeed in getting my most basic point across, neither do I know how to right now.

In addition, a good way to establish that your subject matter is real and not imaginary is to show people.

With the limitations of language, our current technology? You can only figure out the truth for yourself, it is empirical, it can't be otherwise.

I suppose in principle you could describe a time when you made the mistake in question.

Which mistake? In what larger context?