Full Idea
From the intuitionist point of view natural numbers are mental constructions, so their totality is only potential, but it is neverthless a fully determinate totality.
Gist of Idea
Intuitionism says that totality of numbers is only potential, but is still determinate
Source
Michael Dummett (Frege Philosophy of Language (2nd ed) [1973], Ch.14)
Book Reference
Dummett,Michael: 'Frege Philosophy of Language' [Duckworth 1981], p.507
A Reaction
This could only be if the means of constructing the numbers was fully determinate, so how does that situation come about?