UPDATE: Looking back at this, I didn’t know enough about the brain to come to these conclusions. I was wrong. It was an interesting thought though.
It will soon be possible to map out some one’s entire neuron network. With this feat, we will be able to tell what ideas and concepts in the brain link to each other and to what degree. For example, I would suspect that the physical neuronal representation of the concept of ketchup in your mind is linked to the physical neuronal network of concepts of the color red, hotdogs, and food to a high degree. Although still hypothetical, there is evidence to suggest that such physical representations exist. They are called grandmother cells. I think we can all agree, that at some level , a physical representation of ideas must exist in our brains.