is not a body. It is false that a thing is seen because it is coloured, for if that were so, it would not be seen. It is false that a thing is seen because it is a colour, for if that were so, a body would not be seen.’

They said:

‘Once all these conceivable alternatives have been ruled out, the only remaining explanation is that a thing is seen because it exists.’”

He said:

“The fallacy in this argument is plain. Some visible things are visible in themselves, while others are visible by virtue of what is visible in itself.

Such is the case with colour and body: colour is visible in itself, whereas a body is visible by virtue of its colour. Likewise, whatever has no colour cannot be seen. If a thing were seen solely because it exists, then sounds and all the other objects of the five senses would necessarily be seen. Hearing, sight, and the rest of the five senses would thus be a single sense. All this is contrary to what reason apprehends, and the theologians have been compelled, on account of