> This presumes that people are swayed by the content of an argument. This is a false assumption, people are mostly swayed by the volume of the argument.

That's only half the story. The other half is tone. I have been persuaded against several beliefs that should have won me over if volume were the only consideration due to the quality of the writing. "These people type like morons, it's probably a belief primarily found amidst the stupid", as it were.