All clocks are 30 seconds late

The author argues that everyday clocks, which show only hours and minutes but not seconds, are essentially 30 seconds late due to truncation. By truncating seconds, these clocks do not accurately represent the current time, leading to an average error of 30 seconds. If clocks rounded to the nearest minute instead, the average error would be zero. The author explores timekeeping conventions at different time scales and suggests that rounding is more intuitive for minutes and seconds.