You might be surprised at how many Americans think that Jesus spoke English.

Source: am American.

If Jesus exists, he probably can speak English. I'm sure that's not one of his limitations.

The US mile is different from the UK mile and US gallons are sufficiently different from UK gallons. Yes, our measurement system is almost entirely homegrown at this point.

The UK had multiple incompatible measures with the same name. The 'imperial' measures were the result of a standardisation of these measures.

The US gallon is the same as the now-defunct English 'wine gallon'. The US mile was similarly the same as the UK statute mile, until it was indirectly redefined in terms of the metric metre in 1893. So at least the two examples given are not homegrown.

I wish the pub down the street served UK pints :(

"It's always been that way" is similar to "it was invented here" in that regard. Besides, the imperial units had local versions and some still do. There are AFAIK no US inches and yards, but US gallons and US pints.

Trusting us Americans to know history? Not a chance.

Many americans seem unaware of many things that happened before 1776. How many americans even know that the constitution wasn't made until many years later, how many even know the articles of confederation exist, or the politics of 1600s colonies? Many americans seem to think the declaration of independence is legally binding.

We are an incredibly stupid country, because many of us actively devalue education, or otherwise denigrate people who learn. The requirements for teaching and education varies wildly state to state, including many states that basically have NO requirements for teachers, and we have actual, real, paper textbooks purchased by southern school systems that teach slavery as "not that bad"