<human>: Can you provide a brief rundown of the text in within 3 sentences?

I'll go first, since i normally don't get many replies. 

I was talking to my friend one evening about how I've become such a grammar stickler that I'll even subconsciously put the correct form of "your, you're, their, they're, and there" in my text messages even when i'm not paying the least bit of attention to them, and how I'll notice it to death when other people misuse them (It's like i post on forum sites or something.)

He turns to me and says "You know, my girlfriend is a linguistics major, and she was talking to me about that. One of these days those words will probably just merge into one word." (He meant like everything will just be your, or there, etc.)

I quickly reply with a "No, that's dumb." I've mastered the art of retort apparently.

He immediately comes back with "Think about it, it's progress, because yes, it may be wrong now, but when have you ever seem somebody use the wrong form and NOT been able to understand what they really meant."

He had a point, though i still felt myself clinging to my argument for no discernible reason other than my caveman "Biggest rock is best rock." mentality.
<bot>: Friend told me grammar didn't truly matter, gave valid point, and i stuck my fingers in my ears and went "lalalalalalalalalala"