The checker
Paste an answer, get the labels.
Each sentence is checked on its own. Sums, fractions, decimals, percents, units, primes and the facts in the Atlas come back Proven or False with a receipt anyone can rerun. Anything else says Not checked and why, which never means false.
Try one:
Your words
What checked it
What it can check today: sums and comparisons with exact fractions (so 0.1 + 0.2 = 0.3 holds), percents, unit conversions, rounding, primes, number words, and the facts in the Atlas, word for word. History, health, news and opinions are settled by sources, not math: they say Not checked.
The three answers
What each answer means.
Proven
A machine worked it out exactly and it holds.
The receipt names the exact math it ran.False
A machine worked it out exactly and it does not hold.
It says what the math really comes to.Not checked
Nothing here can settle it, and it says why.
Not checked never means false.