EXAMPLES OF PROPOSITIONS 1

(P ∧ Q) + --> (P ∧ Q) = . If P and Q happen now then they are simultaneous.

Q< ∧ R2< . Q happened today and R happened this year.

(P ∧ Q) < X . P and Q happened today, in sequence. 

Q4< --> Q5< . If Q happened one century ago, then Q happened in the Christian era. 

S5< V S6< . S happened in the Christian era or S happened before the Christian era.