Difference between Foolish and Unreasonable

FOOLISH vs UNREASONABLE: ADJECTIVE

Such as a fool would do; proceeding from weakness of mind or silliness; exhibiting a want of judgment or discretion.
Insignificant; trivial.
Embarrassed; abashed.
Capable of arousing laughter; absurd or ridiculous.
Lacking or exhibiting a lack of good sense or judgment; silly.
Devoid of good sense or judgment
Marked with, or exhibiting, folly; void of understanding; weak in intellect; without judgment or discretion; silly; unwise.
Absurd; ridiculous; despicable; contemptible.
Lacking good sense or judgement; unwise.
Resembling or characteristic of a fool.
Having or revealing stupidity

Synonyms Silly, Foolish (see absurd); shallow, brainless, harebrained, simple.
Slight; insignificant.
Denoting or indicative of folly.
Ridiculous; contemptible.
Like a fool; manifesting folly; deficient in understanding, sense, or discretion; weak in intellect or judgment; unwise.
Proceeding from or prompted by folly; exhibiting a want of discretion or discrimination; silly; vain; trifling.

Not showing good judgment
Synonyms Absurd, Silly, Foolish, etc. (see absurd), obstinate, wrong-headed, extravagant, unfair, unjust, extortionate.
Inconvenient.
Not listening to or acting according to reason; not guided by reason; not influenced by reason.
Not endowed with reason; irrational.
Exceeding the bounds of reason; beyond what is reasonable or moderate; exorbitant; immoderate: as, an unreasonable price.
Not reasonable or agreeable to reason; irrational.

Insane, Nonsensical, Unreasonable, Harebrained, Fatuous, Fool, Preposterous, Absurd, Asinine, Ridiculous, Misguided, Ludicrous, Silly, Stupid, Unwise

Senseless, Incongruous, Silly, Indefensible, Inordinate, Undue, Foolish, Untenable, Excessive, Absurd, Irrational, Illogical, Unrealistic, Unjustified, Unwarranted

Insane, Nonsensical, Unreasonable, Harebrained, Fatuous, Fool, Preposterous, Absurd, Asinine, Ridiculous, Misguided, Ludicrous, Silly, Stupid, Unwise

Senseless, Incongruous, Silly, Indefensible, Inordinate, Undue, Foolish, Untenable, Excessive, Absurd, Irrational, Illogical, Unrealistic, Unjustified, Unwarranted

Anyone not using the AMEX deal is foolish.
MASTER: That would be very foolish of you.
Are Economic Giants Penny Wise But Pound Foolish?
Baloo knows it; I know it; the Pack know it; and even the foolish, foolish deer know.
So, the preaching of the gospel is not foolish, but the question today is: Is there such a thing as foolish preaching?
You looked foolish the last two times you said it for the previous two contracts, and you will look foolish again this time.
Of all the foolish Fears of Humankind, Fear of the Future is by far the most foolish.
There are no foolish trades, there are only foolish people.
Young and Foolish Young and foolish Why is it wrong to be Young and foolish?
That foolish idea may not be so foolish after all.

Disarm unreasonable and difficult behavior when correctly used.
Therefore all progress depends on the unreasonable man.
An attorney shall not make an agreement for, charge, or collect an unreasonable fee or an unreasonable amount for expenses.
It would, for example be unreasonable to insist on compliance with the clause if it was unreasonable or impossible for the person to comply.
Whether a behaviour is unreasonable can depend on whether a reasonable person might see the behaviour as unreasonable in the circumstances.
Charter arguments, such as unreasonable delay, the right to be secure against unreasonable search and seizure, and the right to counsel.
You can definitely sue for unreasonable delays if you can prove that the delays are, in fact, unreasonable.
The traveller complained that the arrest was unreasonable and that various actions of the involved police officers were unreasonable.
An unreasonable comprehensive doctrine is unreasonable in the sense that it is incompatible with the duty of civility.
The Right Against Unreasonable Search and Seizure The Fourth Amendment protects persons from unreasonable searches and seizures.