Thank god I can be trusted

So yesterday a middle aged man walked into the store and asked the address. This is the conversation that followed:
"We are at 300 Yale." (me)
"300... where is 301?" (him)
"um, I dunno. But since this is 300 it must be across the street."
"across the street?"
"yeah, cause this side is evens. So 301 must be across the street"
"See, I had a package sent to me, but the guy put the wrong address. He sent it to 301."
"Well you should ask across the street."
"You're sure that this is 300?"
"Yeah, pretty sure. Wanna see a business card?"
"Well I guess I will trust you" *storms out*