[betty boop]

Does that mean you consider some mathematics to be more "trustworthy" than others?

No. Math is math — "it is what it IS."

And it is indispensable to the acquisition of knowledge about our world, and ultimately to human well-being.

[tacticalogic]

No. Math is math — "it is what it IS."

And it is indispensable to the acquisition of knowledge about our world, and ultimately to human well-being.

Indeed. And whether it is a measurable quantity or not is irrelevant to it being indespensable. So what's the problem?