Okay, thank you very much. That I was unable to come up with those counter-examples regarding relatedness tells me everything I need to know about the strength

Okay, thank you very much. That I was unable to come up with those counter-examples regarding relatedness tells me everything I need to know about the strength of my reasoning. It's not so much a problem of terminology, although one exists; I'm like one of those elderly people who believe they can still drive a car without any difficulty, but should actually no longer be in possession of a license. I'll try to take the step of testing out my intuitions a bit on paper in the future.