Full Idea
Whether or not 'truth' has two meanings, I think 'holding for true' has two kinds. One is practical holding for true which alone is entitled to the name of Belief; the other is the acceptance of a proposition, which in pure science is always provisional.
Gist of Idea
'Holding for true' is either practical commitment, or provisional theory
Source
Charles Sanders Peirce (Reasoning and the Logic of Things [1898], IV)
Book Reference
Peirce,Charles Sanders: 'Reasoning and the Logic of Things', ed/tr. Ketner,K.L. [Harvard 1992], p.178
A Reaction
The problem here seems to be that we can act on a proposition without wholly believing it, like walking across thin ice.