Consider for a moment the following bits of wisdom:

• At a wine tasting: “We only drink merlot”
• From an online ad for a 16-inch cymbal: “I won't play it 'cuz I only play 18 inch crashes”
• And how about this morsel from years ago: “There’s no place for the saxophone in jazz”

It crops up all the time: the invisible, immovable line that divides the acceptable from the unacceptable.