Re: YANC: Plausibility question

: For what's countable nouns in normal languages, wouldn't the "small
amount"
: number VERY easily become a de facto singular number?

Yes.  That was part of the idea, though for unique entities like a person,
the unspecified number is used.  The divider between small and large falls
around where objects become difficult to know the number of on sight -
around six.
Possibly this'll be an ancestor lang to something that distinguishes mass
and countable, where countable loses the unspecified and mass loses the zero
number, and in countable objects small and large will become
singular/plural.

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Shreyas