Full Idea
Any two states of affairs are logically connected, simply because both are entailed by their conjunction.
Clarification
The conjunction of x and y is 'x AND y', which requires them both to be true
Gist of Idea
Any two states are logically linked, by being entailed by their conjunction
Source
Gilbert Harman (Thought [1973], 8.1)
Book Reference
Harman,Gilbert: 'Thought' [Princeton 1977], p.127