Why SoloLearn denies correct answer?

Question

css learning didnt accept -webkit-, -webkit, or webkit as Google Chrome vendor prefix??? WTH

Answer 1

Maybe it's not the answer that was expected. The lessons and challenges are not evaluated by people or smart AI. There is a specific correct answer based on the lesson and your answer, even if it's technically correct, might not be the one it is looking for.

Or maybe your answer is wrong and you just don't realize it.

Please be more specific on which lesson and what answer you gave. We're not mind-readers here...