I want to know the answer to the following question:
Who decided that chemistry and alchemy were different?
All the background I'm provided with is that "A decisive moment came when 'chymistry' was distinguished from alchemy by Robert Boyle in his work The Sceptical Chymist, in 1661; although the alchemical tradition continued for some time after his work.". Is that enough to answer the question?
Answer: yes