Full Idea
In a bold manouevre Armstrong posited a metaphysically primitive relation of necessitation, and then defined truth-makers in terms of this bridging relation, as a thing that necessitates something being true.
Gist of Idea
Armstrong says truthmakers necessitate their truth, where 'necessitate' is a primitive relation
Source
report of David M. Armstrong (Truth and Truthmakers [2004], 02.3) by Fraser MacBride - Truthmakers 1.2
Book Reference
Armstrong,D.M.: 'Truth and Truthmakers' [CUP 2004], p.7
A Reaction
[Not sure of page reference] Spelled out so clearly by MacBride, this sounds dubious. How many truths are necessitated by the City of London? Do truthmakers necessitate the existence of their truths? MacBride says it's a circular theory.
Related Idea
Idea 18469 God might necessitate that something happen, but He is not the truth-maker for it [Smith,B]