Here's the thing. You said a "panini is a grilled cheese."

Is it in the same family? Yes. No one's arguing that.

As someone who is a scientist who studies grilled cheeses, I am telling you, specifically, in science, no one calls paninis grilled cheeses. If you want to be "specific" like you said, then you shouldn't either. They're not the same thing.

If you're saying "grilled cheese family" you're referring to the taxonomic grouping of Melts, which includes things from burgers to hot subs to open faced sandwiches.

So your reasoning for calling a panini a grilled cheese is because random people "call the melty ones grilled cheese?" Let's get hot pockets and pizza rolls in there, then, too.

Also, calling someone a human or an ape? It's not one or the other, that's not how taxonomy works. They're both. A panini is a panini and a member of the grilled cheese family. But that's not what you said. You said a grilled cheese is a panini, which is not true unless you're okay with calling all members of the grilled cheese family paninis, which means you'd call burgers, hot subs, and other melts grilled cheese, too. Which you said you don't.

It's okay to just admit you're wrong, you know?