Mathematical realism, like realism in general, holds that mathematical entities exist independently of the human mind. — Wikipedia
Grapheme–color synaesthesia or colored grapheme synesthesia is a form of synesthesia in which an individual's perception of numerals and letters is associated with the experience of colors — Wikipedia
Reports include feeling sensations in the hands or feet, coupled with visualizations of shapes or objects when analyzing mathematical equations, physical systems, or music. In another case, a person described seeing interactions between physical shapes causing sensations in the feet when solving a math problem. — Wikipedia
That tree is number 7 and smells fishy.
Hey only kidding. What impresses me about platonic realism is that numbers and fundamental concepts are not the product of your mind or mine, but can only be grasped by a mind. Whereas the tendency of empiricism is to attribute reality only to things that exist in space and time - the expression is ‘out there somewhere’. So they’re real in a way that sense objects are not. — Wayfarer
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