This is the first time I've read one of these chain emails since 2001.
  1. "Why are there interstate highways in Hawaii?"
    This is easy. It's just our name for the federal highway system. Any major highway at least 90% federally funded is an "interstate."
  2. "Why do 'fat chance' and 'slim chance' mean the same thing?"
    Seriously? This is also pretty easy. They're both idioms. The former is sarcastic.
  3. "Why do we park on driveways and drive on parkways?"
    I dunno, why do we spend our short lives being inexplicably cruel to one another?
  4. "Why isn't phonetic spelt the way it sounds?"
    It is. "PH" makes that sound. Our alphabet is highly logographic. And all language is to some extent arbitrary.
  5. "Why do they put Braille dots on the keypad of the drive-up ATM?"
    I'm going to guess it has something to do with the Americans with Disabilities Act of 1990.
  6. "Why isn't palindrome spelled the same backwards as it is forward."
    A thing does not need to exhibit the trait described in order to describe that trait.
  7. "What do sheep count when they can't get to sleep?"
    Sheep aren't sentient.
  8. "If corn oil comes from corn then where does baby oil come from?"
    This took me 2 seconds to look up. Petroleum and related byproducts.
  9. "If Barbie is so popular, why do you have to buy her friends?"
    Barbie is a commodity. Commodities do not have "friends" in the same way people do. Maybe you should brush up on your Marx.
  10. "If you ate pasta and antipasti, would you still be hungry?"
    No. That's two courses.
  11. "Do you need a silencer if you are going to shoot a mime?"
    Sure, if you are trying to shoot him quietly they die just like any other human I'm not sure what the controversy is here.
  12. "If pro is the opposite of con, is progress the opposite of congress?"
    No, they are unrelated words.
  13. "Isn't it a bit unnerving that doctors call what they do 'practice'?"
    No. Again, language is arbitrary.
  14. "If one synchronized swimmer drowns, do the rest end up drowning as well?"
    That would be a tragedy.
  15. "If a mute swears, does his mother make him wash his hands with soap?"
    I refer you, again, to the Americans with Disabilities Act of 1990.
  16. "If you wore antennae to a wedding, would the reception be better?"
    Okay, you got me. This one is pretty good. 👏👏👏👍