pp1p16c2 per accidens

Meaning Causa per accidens is occasionally used in complementary pair with causa per se {1p16c1} {3p15} and causa efficiens. Propositions {{3p16}, and {4d05} use "emotions contrary by accident" as complementary to "emotions contrary by nature". It seems that a partial cause r is a causa per accidens if it occurs necessarily as part of set A of things forming an adequate cause but there are other, usually many, sets B that each are adequate causes for the same effect and r is not necessary in all sets B.
Related concepts related to accidens: contingens
Occurrence [geomap]
{1p16c2 non accidens}                                                                   ...per se  ^  per accidens...
...God is a cause in himself...not ...through an accident... ...Deum causam esse per se, non vero per accidens...
{3p16 imaginamur simile}                                               ...causa per accidens ^ causa efficiens...
...the thing...will be accidentally...a cause of pleasure or pain. ...not the efficient cause... res ....erit ...per accidens ... causa ...non sit horum affectuum causa efficiens....
{4d05 contrarios affectus}                                                          ...natura ^ per accidens...
...contraries, not by nature, but by accident... ...nec natura sed per accidens sunt contrarii...