Full Idea
Some dispositions, such as loquaciousness or irascibility, are disposed to manifest whether they are provoked to do so.
Gist of Idea
Some dispositions manifest themselves without a stimulus
Source
Friend/Kimpton-Nye (Dispositions and Powers [2023], 2.3.3)
Book Reference
Friend/Kimpton-Nye: 'Dispositions and Powers' [CUP 2023], p.24
A Reaction
We might surmise that such people have internal triggers that get them going, rather than overt ones. The Sun has a disposition to shine, without an external stimulus. The theory of powers says nature is active, rather than being disposed to activity.
Related Idea
Idea 23704 We could analyse dispositions as 'possibilities', with no mention of a stimulus [Friend/Kimpton-Nye]