Agreed, on evening walks my partner and I sometimes take a rangefinder and take competing guesses at different chosen landmarks then see who wins when the range finder confirms it. The rule is that anyone can nominate a landmark and to score a point the guess has to be within 5% for <100, 10% 100-300, and 5% for anything over 300. Any guess that is outside 20% is a lost point.
~75% of scored points are within the last ~25% of guesses.
Anyone still following this will have clocked that guess and confirm is effective at teaching good range guesstimating.
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