Can you persuade me from Agnostic to Atheist?

[wiploc]

Don't conflate those; they are three different things. 

Not necessarily

Antitheists are against theism.  They think it would be better if theists deconverted.

Not necessarily. The base definition relates to any position in opposition to theistic claims. Consequently a gnostic/strong atheist is an antitheist. There are further actions that could result from antitheism, such as the idea you listed, but those are not required to be an antitheist, just that you believe that god/s do not exist. This is an example where terms pick up additional baggage, as 'atheism' has.

Gnostics know (or think they know) whether gods exist.  You can't be a gnostic weak atheist, because that would mean you knew something without believing it.  So any gnostic atheist is a strong atheist, specifically one who believes gods do not exist, and who also knows (or thinks she knows) that gods do not exist.

I already understand the definitions. I spend much time correcting people on them  

Strong atheism is just believing that gods do not exist.

As is antitheism.

Some people try to discourage the atheism by defining the word in ways that make it hard to justify.  For instance, if you define an antheist as one having absolute certainty that no gods exist, or as one who would refuse to believe that gods exist even if compelling evidence for gods was produced, then you make atheism seem unreasonable and unattractive. 

When people use "antitheist" to mean "strong atheist" I assume they are doing a similar move, trying to make atheism unattractive by making it sound hostile. 

(Note that I'm not talking about your motives.  You seem reasonable.)

So I'm not going to use antitheism to mean strong atheism.  Should I avoid the word entirely, or does it have some useful meaning?  I hadda look it up. 

I went to dictionary.comm.  It offers only one definition:  "one opposed to belief in the existence of a god."  That's a useful word then.  It even describes me. 

But it doesn't describe all strong atheists. 

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So that's the reason and dictionary support for my position.