If you read Dijkstra's letter it wasn't about formal proofs. It was about go to statements being very hard to reason about, especially when trying to understand

If you read Dijkstra's letter it wasn't about formal proofs. It was about go to statements being very hard to reason about, especially when trying to understand the flow of a program and how you got to a particular point in its execution. The word "proof" doesn't even show up in the letter. It's only a page or so, well worth a read instead of guessing at what he may have been writing about. http://www.u.arizona.edu/~rubinson/copyright_violations/Go_To_Considered_Harmful.html http://www.u.arizona.edu/~rubinson/copyright_violations/Go_T...