I didn't try to ask two diff. question. I can't even make sense of that first sentence...
What mathematical proof? Is your answer, then "yes, a nonfool can choose to be a fool"?
I do not understand how that passage explains "how".
Forgive me if my analogy wasn't clear. In my head I was thinking of a high school math problem, where a vehicle is measured at one speed at point A and another speed at point B (both within the allowed speed limit) but given the time between the two points and the distance you can prove (even graphically) that the vehicle could not have covered that distance without (illegally) speeding.
Yes, the wise can become fools. But there is some difference of meaning in the word "fool" that depends on context. For example, this passage below uses the phrase similar to Socrates "I am the wisest man alive, for I know one thing, and that is that I know nothing."
1 Corinthians 3:18-19 KJV
(18) Let no man deceive himself. If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise.
(19) For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.
As to how the wise become foolish,
1) the covering cherub in Eden was created perfect, in wisdom and brightness, and of all beings should have known the power of God (wisdom)
2) That angel tried to overthrow God (see Isaiah 14) and still is trying to fight him today, when common sense should show how absurd and impossible it would be for a created angel to overthrow one that can create or destroy with a word
3) and what facilitated this change? PRIDE. "Thine heart was lifted up because of thy beauty" and "thou hast corrupted thy wisdom by reason of thy brightness." If you want to see real stupidity in action, look for the prideful people.There's no shortage of examples on these forums even. Pride can level the smartest person to their own idiotic destruction. On the other hand, it is written, "The fear of the LORD is the beginning of wisdom" (Psalm 111:10, Proverbs 9:10, see also Proverbs 1:7).
Proverbs 9:8-10 KJV
(8)
Reprove not a scorner, lest he hate thee: rebuke a wise man, and he will love thee.
(9) Give instruction to a wise man, and he will be yet wiser: teach a just man, and he will increase in learning.
(10) The fear of the LORD is the beginning of wisdom: and the knowledge of the holy is understanding.
You have heard the expression, "Pride goeth before the fall?" Consider the account of Pharaoh in Exodus. Having seen all of their gods destroyed one by one, from the Nile turning to blood, days of darkness, and the death angel claiming their firstborn, what does he do when he sees the Red Sea opened? "Chase them into it!" he says. That's a very stupid decision given what he already knew about who he was dealing with. Egyptian kings were no doubt trained in military tactics. But in his arrogance and pride he considered himself equal to a god. Foolishness.
Humility leads to wisdom, pride leads to foolishness.