Daft_ishHow likely do you think it is that there may have been a person in a the last 2000 years who solved one of life's great mysteries but never reported/recorded it?
SnokenKeekaGuardLemon helping with scurvy was reported and recorded but then forgotten. I think losing knowledge is more likely than unreported knowledge, especially regarding lifes great mysteries.
Especially so for anything discovered more than a couple hundred years ago when most people couldn’t write, let alone have their findings instantly available to the world via the internet
Or now, when it can be buried in misinformation or the sheer messy size of the Internet.