That was my thought, too. http://grammarist.com/usage/flammable-inflammable/
LOL....I was dong a little research on that topic while you posted that....see my post just below.
Exactly. The majority of the stuff is only 40% alcohol, with small batches getting up to 64.6%.
Flammable, yes.
Inflammable, not really.
Guess you two are too young to remember when gasoline tankers were marked "INFLAMMABLE".