The research we've done can't actually disprove the Loch Ness Monster's existence. People have found animals thought to be extinct, and discovered completely new species. This was all in just the past few years.

I saw a thing on TV talking about the Science behind Santa Claus, or something like that, and the people on the show said that we could not technically say that flying reindeer couldn't exist because we haven't discovered every species on Earth. So if we can say that it's possible for flying reindeer to exist, then why can't Nessie exist?