Full Idea
Not all explanation is causal. Explaining the beauty of a painting is not explaining why something happened. or why a move in chess is illegal, or why the square root of two is not a rational number.
Gist of Idea
Not all explanation is causal. We don't explain a painting's beauty, or the irrationality of root-2, that way
Source
Rowland Stout (Action [2005], 5 'Argument')
Book Reference
Stout,Rowland: 'Action' [Acumen 2005], p.73
A Reaction
It is surely plausible that the illegality of the chess move is caused (or 'determined', as I prefer to say) by the laws created for chess. The painting example seems right, though; what determined its configuration (think Pollock!) does not explain it.