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Beer Arcade · BEU022

Flavor Reasoning Challenge

Separate sensory observations, chemistry, and measurements.

  • 2 curated questions
  • Static playable baseline
  • Evidence-linked feedback

Question 1

Which statement matches BEU's bitterness boundary?

  1. Perceived bitterness and IBU are distinct concepts.
  2. IBU is exact perceived bitterness.
  3. Higher IBU means higher quality.
Show answer & reasoning

Answer: Perceived bitterness and IBU are distinct concepts.

Analytical/model bitterness measures remain separate from sensory perception and quality.

Nuance: Perception depends on context; IBU is not a taste or quality score.

Evidence: Beer Molecules and Its Sensory and Biological Properties: A Review · 2026 Brewers Association Beer Style Guidelines

Question 2

Which compound is explicitly connected to buttery character?

  1. Diacetyl
  2. Ethanol
  3. Lactic Acid
Show answer & reasoning

Answer: Diacetyl

BEU links diacetyl and buttery sensory character while keeping chemistry and perception separate.

Nuance: A buttery observation does not prove a measured diacetyl concentration or its cause.

Evidence: The Microbiology of Malting and Brewing

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