Full Idea
A disposition is 'masked' when it fails to manifest due to interference, such as a fragile vase packed in bubble wrap, or an antidote taken after some poison.
Gist of Idea
'Masked' dispositions fail to react because something intervenes
Source
Friend/Kimpton-Nye (Dispositions and Powers [2023], 2.2.1)
Book Reference
Friend/Kimpton-Nye: 'Dispositions and Powers' [CUP 2023], p.10
A Reaction
[compressed] The easiest account of these would be to say that the stimulus or trigger of the disposition never completely occurs. Poisons are only disposed to kill when they are fully ingested. Bubble wrapped vases can't be properly struck.