Full Idea
Russell held in 'Problems of Philosophy' that the physical world resembles the phenomenal only in abstract structure.
Clarification
The 'phenomenal' world is that of experience
Gist of Idea
Russell (1912) said phenomena only resemble reality in abstract structure
Source
report of Bertrand Russell (Problems of Philosophy [1912]) by Howard Robinson - Perception VII.5
Book Reference
Robinson,Howard: 'Perception' [Routledge 2001], p.176
A Reaction
Russell's problem is that he then requires full-blown and elaborate 'inferences' to get from the abstract structure to some sort of 'theory' of reality, but our experience seems much more direct, even if it isn't actually 'naïve'.