"That is interesting struggler ,I cannot see how a doubling of...

"That is interesting struggler ,I cannot see how a doubling of knowledge under 2years can be any use ."

I was pointing out how outdated knowledge becomes in a short space of time, therefore, when quoting something from a few years ago, one needs to make sure that info is still valid.

How can a doubling of knowledge be any use?? Look around, you're no longer living in a cave, at least not a literal one.