Full Idea
Kant said the representational content of thought could not be explained by patterns of association or by naturalistically understood causal patterns; the cognitive content of thought is constituted entirely by the norms governing judgemental synthesis.
Gist of Idea
Associations and causes cannot explain content, which needs norms of judgement
Source
report of Immanuel Kant (Critique of Pure Reason [1781]) by Terry Pinkard - German Philosophy 1760-1860 01
Book Reference
Pinkard,Terry: 'German Philosophy 1760-1860' [CUP 2002], p.35
A Reaction
I'd be inclined to say that it needs a concept of truth, rather than Kant's tangle of norms and categories. Maybe the content is there before the associations get to work.