Full Idea
Mellor offers a distinction between 'facts' and 'facta' (the latter being the truth-makers for facts).
Gist of Idea
We might use 'facta' to refer to the truth-makers for facts
Source
report of D.H. Mellor (The Facts of Causation [1995]) by Jonathan Schaffer - The Metaphysics of Causation 1.1
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.5
A Reaction
The idea is that 'facta' can do the work in causation, because 'facts' are not part of the world. This seems a very helpful terminology, which should be encouraged, since 'fact' is plainly ambiguous in current usage.