Sorry for resurrecting, but I have a related question and the topic title still applies:
Does the Alchemist and Master Chymist levels stack for the purpose of satisfying discovery requirements? They do for elixirs, advanced mutagens and bomb damage, but discovery prerequisites is kind of vague. Since advanced mutagens are kinda like discoveries it's very tempting to say they do.
This (https://www.youtube.com/watch?v=1x-P3MVRd5M) would suggest it does not stack, but the reasoning builds on the extracts being "the only" way you're counted as having increased in alchemist level, when you do, to the contrary, also increase in bomb damage as if you gained an alchemist level.
