Welcome, sisyphus85 !
I have two guesses re: your name. One--you struggled thru
school, from which you graduated in '85; two--you graduated in '85, and have had an uphill battle ever since.

Now to the (non-moot, apparently) point--I have always understood moot to mean that the outcome has already been decided, so there is no use in further argument/discussion.
This, like Bingley, I picked up from attorneys.

I will now put what Gurunet has. No wonder there is such
confusion--what it means depends on how you use it!
moot (mūt)
n.
Law. A hypothetical case argued by law students as an exercise.
An ancient English meeting, especially a representative meeting of the freemen of a shire.
v.tr., moot·ed, moot·ing, moots.

To bring up as a subject for discussion or debate.
To discuss or debate. See Synonyms at broach1.

Law. To plead or argue (a case) in a moot court.

adj.
Subject to debate; arguable: a moot question.

Law. Without legal significance, through having been previously decided or settled.
Of no practical importance; irrelevant.
moot'ness n.

USAGE NOTE: As an adjective moot has come to be widely used to mean “no longer important, irrelevant,” as in It's a purely moot question which corporation you make your rent check out to; Brown will get the money in either case. This usage may be originally the result of a misinterpretation of its legal sense in phrases such as a moot question. A number of critics have objected to this use, but it was accepted by 59 percent of the Usage Panel in the sentence The nominee himself chastised the White House for failing to do more to support him, but his concerns became moot when a number of Republicans announced that they, too, would oppose the nomination.
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The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992, 1996 by Houghton Mifflin Company. All rights reserved.
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moot verb
To put forth reasons for or against something, often excitedly : argue, contend, debate, dispute.
To put forward (a topic) for discussion : bring up, broach, introduce, put forth, raise.
To speak together and exchange ideas and opinions about : bandy (about), discuss, talk over, thrash out (or over), thresh out (or over), toss around. Informal: hash (over), kick around, knock about (or around). Slang: rap3. Idiom: go into a huddle.
adjective
In doubt or dispute : arguable, contested, debatable, disputable, doubtful, exceptionable, mootable, problematic, problematical, questionable, uncertain.
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Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 by Houghton Mifflin Company. All rights reserved.
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moot
moot1 (`mūt)
vt.
To make moot (statute of limitations would moot the effort - S. R. Sontag)

moot2
adj.

[(of a trial or hearing) hypothetical, staged for practice, from moot hypothetical case for law students, argument, deliberative assembly, from Old English mōt assembly, meeting]
Deprived of practical significance Made abstract or purely academic (the case became moot when the defendant paid the sum at issue) see also mootness doctrine compare justiciable ripe moot*ness (`mūt-nəs)
n.
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Merriam-Webster's Dictionary of Law 1996. Merriam-Webster's, Incorporated. Published under license with Merriam-Webster, Incorporated