Okay, then you’re also wrong, along with the others.
There are many circumstances, besides generification, where you can lose your rights to enforce a trademark by not enforcing them. I’m not going to list them all here. There’s a lot.
What might be possible? That I told you I’d seen as a fact that someone on this board claimed that ‘if you don’t use it then you lose it’ was a fact for all IP law, might be possible?
Whoop there it is.
“an equitable defense against a single defendant?”
You have stumped me, and I can’t read anymore until you explain what you mean.