(no subject)

[timelets]

2.1514 The representing relation consists of the co-ordinations of the elements of the picture and the things.
2.1515 These co-ordinations are as it were the feelers of its elements with which the picture touches reality.

--- Wittgenstein. Tractatus.

A - a thing
B - an element of the picture

F: A -> B

I think "the feelers" is a set of Functors that reflect our ability to obtain data from things.