One of my players is going to do a split profession as a Thaumaturge. He had a question regarding creating a potion without knowing the spell. At first I was like no you are unable to but then I read the folloing on pg 51 of CoM: "Using the Alchemy skill, an Alchemist may create a spell potion for the base form of any spell that he knows. An Alchemist may also know the methods for creating one spell potion (whose spell he does not know) or one formula potion for every five ranks in the Alchemy skill. Additional spell or formula potions may be learned using the Researching Magic rules in Chapter 5."
Does that mean the thaumaturge can create any number of potions for any spells (base only) he knows but he can also create one spell and/or formula potion for every 5 ranks in a skill for spells that he does not know but has knowledge of?