I don't believe those are functionally / semantically equivalent - couldn't care less does imply a min() value of care. In contrast, the author is suggesting a

I don't believe those are functionally / semantically equivalent - couldn't care less does imply a min() value of care. In contrast, the author is suggesting a comparative only. And, on careful re-reading, I suspect the author is having a play on syntax & semantics here -- the context of the quote is: > You may ask, since when C has such operator and the answer is: since never. --> is not an operator, but two separate operators -- and > written in a way they look like one. It's possible, because C cares less than more about whitespace. Given that '--' is decrement (kind of 'lessen') and > is greater than (kind of 'more'). Perhaps I am reading too much into that. (I feel 'couldn't care less' is perhaps more common in northern America than elsewhere, and while TFA has a Gabon TLD, appears to be resident in Poland, so automatically receives a lot of leeway in their use of idiomatic English.)