Full Idea
If the proposition 'this thing exists' is analytic, ..then either the thought is the thing, or else you have presupposed the existence and then inferred it, which is just a miserable tautology.
Gist of Idea
If 'this exists' is analytic, either the thing is a thought, or you have presupposed its existence
Source
Immanuel Kant (Critique of Pure Reason [1781], B625/A597)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.566
A Reaction
I love the phrase "miserable tautology"! A possible strategy is to treat God as a self-evident a priori axiom. This would not be a tautology, but it would make evidence irrelevant. This may be the strategy behind Kierkegaard's 'leap of faith'.