It is known that concepts with similar attributes (color, shape... Etc.) are represented in a similar manner in the brain. However, is there any evidence of abstract relations, such as the as causal relation between two events are also represented in similar manners?
For a example, the relation between a switch and a light (wherein the tilting of the switch causes the light to turn on), should have the same representation as a knob and a light (wherein the turning of the knob causes the light to turn on).
What experimental setup could be used to test this with fMRI?