"I want A and I also want B" has nothing to do with "multiple personalities". GP didn't say they wanted an electric Miata that also is a big station wagon, they said they wanted one and also the other -- two separate vehicles.

Hey, do you eat; do you at least every now and then want food? Do you ever wash; do you at least occasionally want soap? But wait, food isn't soap and soap isn't food -- if you want both, you must need medication for your multiple personalities!

See how ridiculous that was?