An idea or artifact is interesting when it is novel and useful across a broad collection of tasks.

“Sometimes you cracking interesting pieces like a primitive ideas from one task and although it is not improving the performance on the current task you can potentially bring that idea to future tasks and that's actually my own definition of interestingness or open-endedness which is an idea need to be”

“or an object or artifact is interesting if it is novel and it also being useful for a larger collection of tasks.”