Full Idea
A tensed fact is stated by a tensed sentence while a tenseless fact is stated by a tenseless sentence, and they belong to two 'realms' of reality. That Socrates drank hemlock is in the temporal realm, while 2+2=4 is presumably in the timeless realm.
Gist of Idea
Tensed and tenseless sentences state two sorts of fact, which belong to two different 'realms' of reality
Source
Kit Fine (Necessity and Non-Existence [2005], 07)
Book Reference
Fine,Kit: 'Modality and Tense' [OUP 2005], p.341
A Reaction
Put so strongly, I suddenly find sales resistance to his proposal. All my instincts favour one realm, and I take 2+2=4 to be a highly general truth about that realm. It may be a truth of any possible realm, which would distinguish it.