They do it to sound smart. It's a stupid tactic to use in debate. So it normally just has the opposite effect on them.
"You're wrong (subject a) didn't occur until ten years after the event" "Well... blah blah long words restate what was said earlier." "You're still wrong, you dumbshit your vocabulary didn't change history!"
"You're wrong (subject a) didn't occur until ten years after the event"
"Well... blah blah long words restate what was said earlier."
"You're still wrong, you dumbshit your vocabulary didn't change history!"