Oh, you think they took a 4 lbs Martian weight and erroneously divided by 2.2 to get kg? The 'assumption' that kilograms mean mass is a fact, not just personal

Oh, you think they took a 4 lbs Martian weight and erroneously divided by 2.2 to get kg? The 'assumption' that kilograms mean mass is a fact, not just personal preference, though I can see how a journalist might miss the distinction and make the error if they only had pounds and their editor said "all units must be reported in metric and imperial". Regarding compilers, resolving this would be like checking that a size_t result (guaranteed to be unsigned) was greater than zero. Sure, it's nice when writers make clear their basic assumptions if they expect their readers to have little knowledge of the subject. We're in the unique position of expecting a writer to have little knowledge, expecting them to be self-aware of that, and expecting them to recognize there's a potential distinction to be drawn between Earth weight, Mars weight, and mass.