y represents that things are related to one another
in the same way. Let us call this connexion of its elements the
structure of the picture, and let us call the possibility of this
structure the pictorial form of the picture.

2.151 Pictorial form is the possibility that things are related to one
another in the same way as the elements of the picture.

2.1511 That is how a picture is attached to reality; it reaches right
out to it.

2.1512 It is laid against reality like a measure.

2.15121 Only the end-points of the graduating lines actually touch the
object that is to be measured.

2.1514 So a picture, conceived in this way, also includes the pictorial
relationship, which makes it into a picture.

2.1515 These correlations are, as it were, the feelers of the picture's
elements, with which the picture touches reality.

2.16 If a fact is to be a picture, it must have something in common with
what it depicts.

2.161 There must be something identical in a picture and what it
depicts, to enable the one to be a picture of the other at all.

2.17 What a picture must have in common with reality, in order to be
able to depict it--correctly or incorrectly--in the way that it does, is
its pictorial form.

2.171 A picture can depict any reality whose form it has. A spatial
picture can depict anything spatial, a coloured one anything coloured,
etc.

2.172 A picture cannot, however, depict its pictorial form: it displays
it.

2.173 A picture represents its subject from a position outside it.
(Its standpoint is its representational form.) That is why a picture
represents its subject correctly or incorrectly.

2.174 A picture cannot, however, place itself outside its
representational form.

2.18 What any picture, of whatever form, must have in common with
reality, in order to be able to depict it--correctly or incorrectly--in
any way at all, is logical form, i.e. the form of reality.

2.181 A picture whose pictorial form is logical form is called a logical
picture.

2.182 Every picture is at the same time a logical one. (On the other
hand, not every picture is, for example, a spatial one.)

2.19 Logical pictures can depict the world.

2.2 A picture has logico-pictorial form in common with what it depicts.

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

2.202 A picture contains the possibility of the