And then, suddenly, everything becomes clear...

@freakonometrics
Of course there are two types of ton, long (2240 lb) and short (2000 lb). This has caused me professional difficulties in the past, trying to assess which sort of ton was used for the capacity of piles installed decades ago.

Did you know that in Québec une pinte = 1 quart = 2 pints?
https://fr.m.wikipedia.org/wiki/Pinte

Pinte — Wikipédia

@mpjgregoire @freakonometrics In very metric France, "un demi" is a half pint, not a half litre. That works only for beer.

But "un demi de rouge" is a half litre pitcher of wine.

It's still much less eff'ed up than the imperial system though, a minor inconvenience at worse.