The word four has four letters. In the English language there is no other number whose number of letters is equal to its value.

The statement claims that 'four' is the only number whose letter count equals its value, but this is false. Numbers like 'three' (5 letters), 'five' (4 letters), 'six' (3 letters), and 'seven' (5 letters) don't match, but the claim incorrectly suggests no other number has this property. In fact, there could be other numbers we haven't checked - the statement makes an absolute claim that can't be verified without checking all numbers.