Ben says "these aren't the droids you're looking for." But if you look closely, you'll see that they ARE the droids they're looking for! I can't believe no-one spotted this...(DE)

Maybe they weren't really looking for droids. Maybe they were just asking the question because that's what they figured good stormtroopers would do in that situation. When really they just wanted to hang out in Mos Eisley and watch the scum and villainy.

That line comes back to me all the time whenever somebody says something that sounds a bit like it. The same with some other classic Star Wars lines. "Move along now" "Sorry about the mess".