Nobody is the same person each day in my opinion. Our differences vary by degree too. Some people are more inconsistent than others. I don't think we're the same person with different situations too. We're different with our parents, different with our friends, different with strangers. I'm not saying we're completely different, but different to a degree.
Nope. It's amazing. Every night I change into someone else. Wait, am I even me right now? I don't know. I might be you. How can I tell?
Quick, tell me something only you would know.
Then I know the answer, I'll know I'm you
But if only you know the answer, how can you tell it to me? Tell me something only you and your best friend knows. Wait, then how do I know if I'm you or your best friend. AGHHHHHHH!
LOL! =) Okay, I apologize for my off the wall answer, but it was too good an oppourtunity to pass up. Hehehe