With regard to the existence of n atomic facts there are Kn=∑ν=0n(nν) possibilities.
It is possible for all combinations of atomic facts to exist, and the others not to exist.
4.28
To these combinations correspond the same number of possibilities of the truth—and falsehood—of n elementary propositions.
4.3
The truth-possibilities of the elementary propositions mean the possibilities of the existence and nonexistence of the atomic facts.
4.31
T
T
T
F
T
T
T
F
T
T
T
F
F
F
T
F
T
F