Although, I would point out that while your argument ad absurdum is generally reasonable (the fact that syntax can make the difference between a very good language and an unusable one), whitespace and malbolge also have terrible semantics that contribute to them being unusable.
As a former Lisp enthusiast (and still an enjoyer), I'd actually use my own darling as an example: Lisps have amazing semantics and are generally good languages. Their syntax is highly regular and structured and easy to parse...except that it's brain-hostile, and I'm convinced that it actively makes it harder to read and write - not just adopt, but actually use.
Are you talking about natural languages here? The so called Sapir Whorf thesis - in its strong or weak form - is rather controversial. There are some interesting findings, but the interpretation of them is still hotly debated.
In any case, none of the studies that I've seen (e.g. about colour perception, spatial reasoning, etc.) seem to be about syntax. I'd have to see some evidence that head-marking language speaker somehow think differently than dependent-marking language speakers and I haven't seen that.
> your argument ad absurdum is generally reasonable
it's a valid argument when somebody is speaking in absolutes, but I haven't seen GGP do that. There's a difference between saying "all syntax is completely arbitrary" and "syntax is not the point" - the latter suggests to me that if you stay within certain reasonable bounds (e.g. not be whitespace or malbolge), whether you use significant whitespace of braces, the language looks more like Pascal or like C, etc. are of minor importance in the grand scheme of things. Which is something you may disagree with, but it's a much more reasonable point that anything you can just counter with "but whitspace!".
I never said anything to the contrary. I specifically stated that syntax was not an important consideration in the design of Pony language. That does not imply the numerous strawmen that you and others attacked here. As Tainnor correctly and honestly noted:
"it's a valid argument when somebody is speaking in absolutes, but I haven't seen GGP do that. There's a difference between saying "all syntax is completely arbitrary" and "syntax is not the point" - the latter suggests to me that if you stay within certain reasonable bounds (e.g. not be whitespace or malbolge), whether you use significant whitespace of braces, the language looks more like Pascal or like C, etc. are of minor importance in the grand scheme of things. Which is something you may disagree with, but it's a much more reasonable point that anything you can just counter with "but whitspace!"."
True, it just means that it's idiotic, rather.
And so no,
> Saying that a certain kind of Scotsman puts sugar on his porridge is very different from saying that no true Scotsman puts sugar on his porridge.
I categorically disagree that these would be meaningfully distinct claims, as the "[only] a certain kind of Scotsman puts sugar on his porridge" bit specifically invokes the implicit disqualification of said Scotsman from being counted as a True Scotsman.
> not the only example of it from that source
Pretty ironic of you to say that.
[0] the literal definition of the no true scotsman fallacy: https://en.wikipedia.org/wiki/No_true_Scotsman
Whereas this follows the form more of "Murder is bad" "I dunno, a lot of Scotsmen commit murder" "Ok, but no true Scotsman would commit murder"
It's the same (annoying) assertion, but the fundamental argument is about the value of murder, not the category of "Scotsmen," so it's not the same extremely obvious fallacy of redefining the literal topic at hand whenever a counterexample is presented.
It's why I called it an outright textbook example: it's an appeal to purity, where purity is determined in a circular way - the very definition of the no true scotsman fallacy, as far as I could find and understand it.