Forum Lurker, I think inflammable and flammable are still synonymous in the UK, hence McGrath's (misunderstanding the intent?) unlike in North America, where, due to the decline in literacy, the average person was judged too thick to understand that "inflamable" printed on a gas tanker truck, might mean it could be ignited.

Hence, in Canada at least, the word "inflamable" was dropped in that instance, in preference to "flammable".