Since when were jeans not trousers?
Apparently since GAP stared offering 30% off trousers, but that doesn't include jeans as "they aren't trousers". Cotton trousers, linen trousers and tracksuit-type trousers are all trousers, jut not jeans.
Does that seem odd? I know that we don't often refer to jeans are "trousers", but they are trousers!