[TylerE]

I disagree. I think my original post is perfect irony.

Effect X being caused by Y and solved by Z AND X being caused by Z and solved by Y is irony.

Dictionary definition: “ a state of affairs or an event that seems deliberately contrary to what one expects”

[singlow]

You selected the relatively modern definition from the dictionary. That usage is fairly recent and is very broad in definition. The verbal and literary definitions are usually the ones that pedants are protective of. I specifically said that it fits that modern definition. I was actually criticizing the parent for calling out your usage, as if his example was more ironic than yours.