> When I say or hear 11:30, I assume it can be within 11:30:00 and 11:30:59. And if you cared about seconds-precision, you would assume 11:30:30, and thus your

> When I say or hear 11:30, I assume it can be within 11:30:00 and 11:30:59. And if you cared about seconds-precision, you would assume 11:30:30, and thus your error would average the same 15s. The difference is that when you observe a minute change, you know that's exactly at zero seconds (instead of 30 — or 31 if you apply the same rounding rule to seconds). It is fair to ask a question if rounding would be more useful (nope), but the entire article is incoherent and speaks mostly of the author's confusion.