Tollen's Test: The test, also known as the silver mirror, is used to identify the presence of an aldehyde functional group in a compound. The test turns negative for ketone. However, an alpha hydroxy ketone gives a positive result.
The question is, what positive reason is there to think that there is some illicit context-shifting going on between our two premises (P1) and (P2)? There appears to be little independent motivation for the idea. In conversation I have heard some cite the feeling that the thing being said...