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Originally Posted by Chill Cosby

based on the scholarly definition of both Atheism and what a belief system is, it checks off all the important boxes (you believe something to be true, a collective community follows said belief, and that belief informs lifestyle and other beliefs).

So in part, a belief system is believing something to be true? Nonsense.

Where's this academic definition of a belief system. A belief system requires a lot more than a single lack of one belief, that's what system means. A belief system is a set of coherent beliefs, mutually supportive.

Belief that god exists or the lack of belief that god exists or belief that god does not exist are not belief systems, because it's either a single belief or a lack of a single belief.

No one "follows" atheism any more than they "follow" theism or "follow" not believing in fairies. Communities arise because people share common ideas (among other things) and enjoy socializing with those people.

People follow a religion because it is more than simple theism, it's a set of mutually supportive beliefs (a belief system). People follow secular humanism because it's a set of mutually supportive beliefs.

Pretty much all beliefs inform other beliefs, just because a belief informs other beliefs or actions doesn't make it a belief system, it's a single belief in a belief system.

And you've also assumed your conclusion in your argument.

Originally Posted by Chill Cosby

An Agnostic believes the existence of god to be unknowable.

Not all agnostics believe this, that's strong agnosticism. There's also weak agnosticism which believes the existence of god to be knowable but not known.

Originally Posted by Chill Cosby

While an Atheist believes there is no god. "Weak Atheism" is essentially Agnosticism, wherein the Weak Atheist believes that there is not enough evidence to justify a definitive position on god.

You're conflating belief with knowledge. Theism/atheism describes belief. Gnostic/agnostic describes knowledge.

A weak atheist lacks the belief in god because either they think there is insufficient evidence or the answer is unknowable.

A strong atheist believes there is no god because they think there is positive evidence against the proposition, or they just believe that despite a lack of positive evidence.

A strong atheist usually qualifies which definition of god they are talking about, as the strength of the claim can vary depending on the definition (even Dawkins does this in The God Delusion).

Originally Posted by Chill Cosby

atheism
[ey-thee-iz-uh m]
noun
1.
the doctrine or belief that there is no God.

Hm, you left out the next one:

2. disbelief in the existence of a supreme being or beings.

Originally Posted by Chill Cosby

The "would change their mind" argument is one that most apologists (yay I get to use the word!) bring out as justification, but it's not a unique qualifier as the same could be said by any agnostic or religious person as well.

You're contradicting yourself, earlier you said changing their mind was not possible by definition for agnostics was that the question was unknowable, so by your definition this is partially wrong.

And you are wrong about all religious people as well, see below.

Originally Posted by Chill Cosby

The type of evidence required would be extreme, or essentially the "evidence" is a straw man, because if you ask an atheist (or any religious person) what evidence would suffice, they themselves would suggest a type of evidence that they believe to be impossible.

I've had many discussions with religious people where I've asked that exact question (what evidence would change their mind) and I've never had an actual answer, the response is either to ignore the question entirely or to say that no evidence would suffice (which I admire at least they're being honest with themselves).

But it's not clear what you are saying people who use the "would change their mind" argument are justifying. That atheists use the "would change their mind" argument to justify that lack of belief isn't a belief? That doesn't make sense.