Whew--just a few days of limited computer time, and I find 141 new posts in Q & A alone. (I am dreading getting back to W & F: 329 new ones.)

Anyway--I do think "professional" speakers (and Presidents) ought to at least bother to pronounce things correctly (er, as in not saying interduce--I don't mean regional differences such as INsurance vs. inSURance). As to envelope--I thought if you said the first syllable as on, it was just a sort-of French pronunciation, as in en garde.