> Hours: That's when mentally, I switch to rounding! At 15:48 I definitely feel like it's pretty much 16:00. Disagree. I would never round to a full hour, only

> Hours: That's when mentally, I switch to rounding! At 15:48 I definitely feel like it's pretty much 16:00. Disagree. I would never round to a full hour, only to nearest 5 minutes. As far as minutes, for clocks that show discrete minutes, it'd be weird to see the minute-hand snap to the next number and think "oh, it's actually 29 seconds before that number". Seeing the snap motion means you're at :00 seconds. Besides, for a clock that doesn't show seconds, it really doesn't matter. If you need more precision, you just use a timepiece with the extra precision.