If we answer " Yes " to that question, we pass on from intuitionalism to idealism - an idealism not on the lines of Berkeley (matter does not exist) but of Plato (things A obey an ascertainable rational necessity).
Hegel offers a supposed proof that Time and Space, Matter, Nature, are ascertainable and definable 2 This is Kant's positive refutation of Hume's scepticism.
By prearrangement, no doubt, uniformity may be obtained in regard to most of the main statistical facts ascertainable at a census, at all events in the more advanced units of the empire, and proposals to this effect were made by the registrar-general of England and Wales in his report upon the figures for 1901.
The few facts definitely ascertainable are collected by G.
Ascertainable fact concerning Eustace is less picturesque, but enough is known to show that he was an adventurous and unscrupulous scoundrel.
How would you define ascertainable? Add your definition here.