Full Idea
The failure of monotonicity is a general feature of explanatory relations.
Clarification
In 'monotonic' logics, what is proved stays proved
Gist of Idea
Explanations fail to be monotonic
Source
Gideon Rosen (Metaphysical Dependence [2010], 05)
Book Reference
'Modality', ed/tr. Hale,B/Hoffman,A [OUP 2010], p.116
A Reaction
In other words, explanations can always shift in the light of new evidence. In principle this is right, but some explanations just seem permanent, like plate-tectonics as explanation for earthquakes.