Full Idea
In the intuitionist version of quantification, the universal quantifier (normally read as "all") is understood as "we have a procedure for checking every" or "we have checked every".
Gist of Idea
Intuitionists read the universal quantifier as "we have a procedure for checking every..."
Source
Michèle Friend (Introducing the Philosophy of Mathematics [2007], 5.5)
Book Reference
Friend,Michèle: 'Introducing the Philosophy of Mathematics' [Acumen 2007], p.122
A Reaction
It seems better to describe this as 'verificationist' (or, as Dummett prefers, 'justificationist'). Intuition suggests an ability to 'see' beyond the evidence. It strikes me as bizarre to say that you can't discuss things you can't check.