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Discussion

Consider the following statements about acceptability and perceptibility.
1. Perceptibility asks whether a difference can be seen at all.
2. Acceptability asks whether it would be tolerated commercially.
3. The two questions always give the same answer.

  • A.1 and 2 only
  • B.3 only
  • C.1 only
  • D.All of them

Answer: A

Correct answer: 1 and 2 only

Statements 1 and 2 give the two distinct questions correctly. Statement 3 is the confusion the pairing exists to prevent: a difference may be plainly visible and entirely acceptable, or invisible in the laboratory and unacceptable when two pieces are laid side by side in daylight. Tolerances are set on acceptability, thresholds established on perceptibility.

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