I want to know the answer to the following question:
In what year did Henry Cavendish recognize hydrogen gas as a discreet substance?
All the background I'm provided with is that "In 1783, Antoine Lavoisier gave the element the name hydrogen (from the Greek ὑδρο- hydro meaning "water" and -γενής genes meaning "creator") when he and Laplace reproduced Cavendish's finding that water is produced when hydrogen is burned.". Is that enough to answer the question?