Board Thread:General Discussion/@comment-28170964-20160412202919/@comment-27701762-20160412230038

1. This point is unclear. What "official statement" is this that you're referring to?

2. What "intimate knowledge?" To my recollection, Sans never directly mentions the name "Gaster," and the closest hint we get is the line "our reports show" during his fight.

3. By that same token, "sans" is a word meaning "without." I don't see what this has to do with demonstrating that Sans is half of Gaster. If we're also discussing words that have some slight simillarity to the name, then "gaster" is apparently defined as a part of the abdomen of an insect, and "aster" is a type of flower. What would these have to do with the claim?

4. Of course, that claim is provided by one townsperson in Snowdin. So it is unclear whether "showing up one day" means "showing up in the Underground one day," or "showing up in Snowdin one day." Nobody else in the game comments on their sudden appearance.

5. This is true, but that isn't actually evidence for your point.

6. This is only a presumption. A widespread and perhaps accurate one, but nonetheless a presumption.

7. Given Toby's claim that Papyrus would refer to Sans as "aniki," it is presumed that Sans is the one who "came first." Though if Sans is half of Gaster, then Papyrus would be as well (which I'm assuming you would agree to). Which brings into question why Papyrus would refer to Sans as his older brother, since the presumption would be that they came into being at the same time. You would also need to explain Papyrus as a character, since he is essentially the antithesis of Sans, but we have no evidence that he is a combination of various personality traits from Gaster (since we have no personality to work off of).

There is also an inconsistency in the theory: If Gaster is spread across time and space, then how is it that he is simultaneously split into Sans and Papyrus, who compose two halves of him? In fact, if Sans has intimate knowledge of who Gaster is and where he is, then this intimate knowledge should display itself by Sans hinting that he is, in a sense, Gaster. Insofar as Sans refers to Gaster as someone who exists somewhere else, this would actually serve as evidence against your conclusion.