number sense in humans may be learned, rather than innate
No shit? 🤣
I'm not entirely sure why they needed neural networks to come to this conclusion, "spontaneous number neurons" or not. You'd only have to look at eg. the Pirahã language to come to the same conclusion; it doesn't have numerals and speakers were generally "mathematically illiterate" up until recent times, and teaching any sort of mathematics (ie. including counting) to a monolingual Pirahã speaker was apparently extremely challenging.
Seeing specific neurons or subnets being activated in relation to numerical tasks and assuming that it means numeral sense is somehow innate is honestly a bit of an odd conclusion to make. Yeah, subnets specialize, but that doesn't mean their specialization is necessarily built into us – just that we have the capacity to do so.