> same with h which can either mean hour or the planck constant. To be fair, I think the probability of a normal person using 'h' to mean the Planck constant i

> same with h which can either mean hour or the planck constant. To be fair, I think the probability of a normal person using 'h' to mean the Planck constant is low enough that "2h" meaning "2 hours" is going to be right ~100% of the time. (Although, actually, having just learnt that `units` comes from Bell Labs, they might well have been using 'h' for Planck constant more than for hours.)