unopinionated, uncommitted, and unwavering

The most
striking sign of this possible influence is how Pyrrho expressed himself
in the actual form of the Four-Fold Negation: “…but we should be
unopinionated, uncommitted, and unwavering, saying concerning each
individual thing that it no more is than is not, or it both is and is
not, or it neither is nor is not” [Aristocles].