What are common mistakes when making MS Theory — Beer Comprehensive?

Question

Accepted Answer

1. Not knowing the three Trappist beer tiers — Single, Dubbel, Tripel, Quad — and their flavour profiles. Westmalle Tripel and Westvleteren 12 are reference-level exam answers for Tripel and Quadrupel respectively.
2. Confusing IBU with perceived bitterness — IBU measures isoalpha acid concentration; perceived bitterness is modulated by malt sweetness, carbonation, body, and serving temperature. A Doppelbock with 25 IBU can taste less bitter than an IPA with 60 IBU due to malt sweetness balance.