> I was curious about the concept of inverting this – requiring that all variables lazily evaluate, and in the case that evaluation is needed now, some keyword

> I was curious about the concept of inverting this – requiring that all variables lazily evaluate, and in the case that evaluation is needed now, some keyword obtains it. That's how Haskell works. Everything is lazily evaluated, and in the case that evaluation is needed now, the "seq" function obtains it (https://wiki.haskell.org/Seq https://wiki.haskell.org/Seq).