A proposition contains the form, but not the content, of its sense.

It used to be said that God could create anything except what would be contrary to the laws of logic. The truth is that we could not say what an 'illogical' world would look like.

A picture depicts reality by representing a possibility of existence and non-existence of states of affairs.

The sum-total of reality is the world.

The existence and non-existence of states of affairs is reality.

The totality of existing states of affairs is the world.

The structure of a fact consists of the structures of states of affairs.

3.331 From this observation we turn to Russell's 'theory of types'. It can be seen that Russell must be wrong, because he had to mention the meaning of signs when establishing the rules for them.

It is as impossible to represent in language anything that 'contradicts logic' as it is in geometry to represent by its coordinates a figure that contradicts the laws of space, or to give the coordinates of a point that does not exist.

From the existence or non-existence of one state of affairs it is impossible to infer the existence or non-existence of another.