Difference between Absurdity and Fatuousness

ABSURDITY vs FATUOUSNESS: NOUN

The quality of being absurd or inconsistent with obvious truth, reason, or sound judgment.
Synonyms Absurdness, silliness, unreasonableness, self-contradiction, preposterousness, inconsistency. See folly.
That which is absurd; an absurd action, statement, argument, custom, etc.: as, the absurdities of men; your explanation involves a gross absurdity.
The state or quality of being absurd or inconsistent with obvious truth, reason, or sound judgment; want of rationality or common sense: as, the absurdity of superstition; absurdity of conduct.
A message whose content is at variance with reason
A ludicrous folly

Sense, Nonsense, Insanity, Paradox, Ineptitude, Ridiculous, Madness, Irrationality, Folly, Stupidity, Fatuity, Absurdness, Fatuousness, Silliness, Ridiculousness

Puerility, Presumptuousness, Speciousness, Pompousness, Shamelessness, Sanctimoniousness, Pointlessness, Banality, Pomposity, Vacuousness, Inanity, Vapidity, Silliness, Absurdity, Fatuity

Sense, Nonsense, Insanity, Paradox, Ineptitude, Ridiculous, Madness, Irrationality, Folly, Stupidity, Fatuity, Absurdness, Fatuousness, Silliness, Ridiculousness

Clownishness, Stupidity, Imbecility, Mindlessness, Presumptuousness, Speciousness, Pompousness, Sanctimoniousness, Banality, Vacuousness, Inanity, Vapidity, Silliness, Absurdity, Fatuity

And no one seems to notice the absurdity.
Any other conclusion would lead to an absurdity.
Black Humor, Existentialism, and Absurdity: A Generic Confusion.
The golden rule is used to remove absurdity.
It went on and on, layer upon layer and absurdity upon absurdity, but it boiled down to a single central warning.
Yet the phenomenological absurdity of this division has not exposed the ideological absurdity of freedom in a world dominated by technocratic rationality.
While there may be absurdity in both cartoons and comics, the absurdity is often a means of comic relief for the audience.
Focus on perennial problems: absurdity that can become horror, reflectiveness gap, parasitic processing, religio and meaning in life, absurdity.
The absurdity safety valve is reserved for truly exceptional cases, and mere oddity does not equal absurdity.
For if absurdity be the subject of laughter, ss is seldom without some absurdity.

From farming to horticulture to history writing to child rearing, all their experiments tend to prove the fatuousness of most human knowledge.