Four fictional slips. S1: archive date 11, named Moon observation attempted, view obstructed by a roof, position unavailable. S2: date 12, observer wrote a plan but explicitly did not attempt observation. S3: date 13, no result record supplied; whether an observation occurred unknown. S4: date 14, a named paper-model planet token was measured at 0 equal paper units from the fixed baseline by a fictional helper. This is a given model measurement, not a real sky distance or learner measurement.
Question 1: What do S1 and S2 say happened? Keep their difference.
Question 2: What can we say about S3? What question could help?
Question 3: What does 0 in S4 measure? What does it not mean?
Question 4: Make one honest status row for a slip.
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