tralse

In the instance of a scientific model or theory being falsified it is proposed to describe the predicate as tralse, ie true before time t and false thereafter.

1991, F.M. Akeroyd, “A practical example of Grue”, in The British Journal for the Philosophy of Science, volume 42, number 4

I mean what kind of a name for a band is Tralse, anyway? True and false at the same time? I can't believe I used to think that was clever.

2012, Kelly Oram, V Is for Virgin

What we should really experience, then, is a fusion of the two, true and false, which we could more accurately record, and refer to, as tralse. The Liar paradox generates tralse, not true and false (which separately are all our minds are capable of handling), and tralse is a permanent state of the two with no oscillations, no variations.

2013, Micheal D. Winterburn, Secrets of the Paradox: Solving the Liar and other logical problems