5.5423 To perceive a complex means to perceive that its constituents are combined in such and such a way.

This perhaps explains that the figure

TLP 5.5423.png

can be seen in two ways as a cube; and all similar phenomena. For we really see two different facts.

(If I fix my eyes first on the corners a and only glance at b, a appears in front and b behind, and vice versa.)