> You might be expecting a linked list of integers, but at some point, some tired, coffee-fueled programmer with a deadline to meet accidentally put a string i

> You might be expecting a linked list of integers, but at some point, some tired, coffee-fueled programmer with a deadline to meet accidentally put a string in there somewhere How often does this really happen in practice? You know the software doesn't work when you try a wrong type, because it blows up on startup or on a request. In my experience my bugs aren't because of problems with types but with logic errors. It compiles but is not correct because you're doing the wrong thing. You know pretty quickly in Python or Javascript when you make a mistake because you pass in the wrong arguments and the right thing _doesn't_ happen. Types don't save you from typing the wrong code or simply doing the wrong thing in a type safe way.