Full Idea
If we assume that mental events are located in time, then it follows immediately, given special relativity, that they are also in space.
Clarification
'Special relativity' is Einstein's theory about the nature of space-time
Gist of Idea
If mental events occur in time, then relativity says they are in space
Source
Michael Lockwood (Mind, Brain and the Quantum [1989], p.73)
Book Reference
Lockwood,Michael: 'Mind,Brain and the Quantum:The Compound 'I'' [Blackwell 1991], p.73
A Reaction
A powerful point. Of course, there might (you never know) be something which exists in time but not space (and thoughts clearly exist in time), but (as in Hume's argument against miracles), dualism will overthrow your other basic beliefs about nature.