Board Thread:General Discussion/@comment-26006155-20190617222636/@comment-26006155-20190702051125

And we have Sure Fire evidence that Beta Gaster engaged in Determination experiments before his death in 201X.

Because he made The Core. Was the only Royal Scientist to work in The Core before Alphys. And Alphys used blueprints she found in The Core to make her working DE extractor.

The blueprints must have been made by Gaster. He must have been researching Determination.

And he was doing this research before Chara, the First Known Human, arrived.