# What are the differences between the two sentences?

Bill makes fewer mistakes than I do.

Bill doesn't make more mistakes than I do.

I guess, 'Bill makes fewer mistakes than I do.' means I RARELY make mistakes, but Bill makes much smaller number of mistakes than I do.

whereas, 'Bill doesn't make more mistakes than I do.' means I OFTEN make mistakes, but Bill doesn't make as many mistakes as I do.

The first one certainly doesn't have that implication.

Bill makes even fewer mistakes than I do.

would imply that I don't make many, but without the even, it doesn't have that implication. If anything, it suggests that I make a lot of mistakes, but if it suggests that it does so weakly.

Bill doesn't make more mistakes than I do.

is understandable, but not idiomatic. It is only like to be said as a direct denial of "Bill makes more mistakes than you do", and it's hard to think of a case in which that is likely to occur.

On the other hand

Bill doesn't make as many mistakes as I do.

is idiomatic. That does have at least a suggestion that I make a lot of mistakes, though I wouldn't put it as strongly as an implication.

• Thank you very much. I want to make line feed but I'm sorry it's yet difficult for me m(_ _)m Basically these two sentences indicate the difference between two people, not showing the absolute ability to not make mistakes. But rather, 'A do as few as B do' implies B seldom make mistakes, and 'A do not do as many as B does' implies B often make some mistakes. Mar 23, 2021 at 16:13
• If you mean you're trying to make a line break in a comment, there's no way to do that. Your first example is right, but your second is not. Few and many are not symmetrical. Many is the default, so in expressions like how many or as many as there is no implication that the number is large - it can be anywhere on the scale. But few is marked: if you choose how few or as few as, you are implying that the number is small. It's similar to the way As short as Jack implies that Jack is short, but as tall as Jack does not imply anything about Jack's height. Tall is the default Mar 23, 2021 at 19:11
• Thank you for your detailed explanation. Mar 24, 2021 at 12:05