The research team determined that the reported anomaly was merely an ephemeral artifact of calibration error. What does 'ephemeral' signify?

Answer and explanation

Correct answer: A. Lasting for only a very brief duration

  1. Step 1: 'Ephemeral' comes from Greek 'ephemeros' (lasting a day).
  2. Step 2: It denotes transient, short-lived, or fleeting phenomena.
Answer
Lasting for only a very brief duration.
Why not the others: 'Permanently embedded' is the direct antonym; 'Mathematically impossible' describes unfeasible results; 'Replicable' describes strong findings.

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