 He also translated various mathematical terms into Dutch, making it one of the few European languages in which the word for mathematics, "wiskunde" ("wis" and "kunde", i.e., "the knowledge of what is certain"), was not a loanword from Greek but a calque via Latin.He also replaced the word "chemie", the Dutch for chemistry, by "scheikunde" ("the art of separating"), made in analogy with "wiskunde".Very little is known with certainty about Stevin's life and what we know is mostly inferred from other recorded facts.