That’s not a quote. You capitalized "Code-is-data" as if it were starting its own sentence. Had you quoted the whole sentence, your response would've seemed more like a non-sequitur.
In any case, there is no definition of even "chair". (Which partitions the world into chair and not-chair. Simply imagine a continuum between a particular chair morphing into a not-chair; where exactly does it stop being a chair?) So I'm unconcerned about edge-cases, where a language is actually in a fuzzy part of that continuum. Not to mention those amusing blogposts claiming "Javascript is a Lisp!" which maybe aren't objectively true but inspiring.
In any case, there is no definition of even "chair". (Which partitions the world into chair and not-chair. Simply imagine a continuum between a particular chair morphing into a not-chair; where exactly does it stop being a chair?) So I'm unconcerned about edge-cases, where a language is actually in a fuzzy part of that continuum. Not to mention those amusing blogposts claiming "Javascript is a Lisp!" which maybe aren't objectively true but inspiring.