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Full Idea
For Schopenauer there are physical necessity, logical necessity, mathematical necessity and moral necessity.
Gist of Idea
Necessity is physical, logical, mathematical or moral
Source
report of Arthur Schopenhauer (Fourfold Root of Princ of Sufficient Reason [1813]) by Christopher Janaway - Schopenhauer 2 'Fourfold'
Book Ref
Janaway,Christopher: 'Schopenhauer' [OUP 2002], p.20
A Reaction
These derive from four modes of explanation, by causes, by grounding in truths or facts, by mathematical reality, and by motives. Not clear why mathematics gets its own necessity. I like metaphysics derived from explanations, though. Necessity makers.
| 21920 | No need for a priori categories, since sufficient reason shows the interrelations [Schopenhauer, by Lewis,PB] |
| 21362 | Necessity is physical, logical, mathematical or moral [Schopenhauer, by Janaway] |
| 21361 | For Schopenhauer, material things would not exist without the mind [Schopenhauer, by Janaway] |
| 21921 | Concepts are abstracted from perceptions [Schopenhauer, by Lewis,PB] |
| 21918 | Sufficient Reason can't be proved, because all proof presupposes it [Schopenhauer, by Lewis,PB] |
| 21919 | Object for a subject and representation are the same thing [Schopenhauer] |
| 21917 | The four explanations: objects by causes, concepts by ground, maths by spacetime, ethics by motive [Schopenhauer, by Lewis,PB] |
| 21363 | Motivation is causality seen from within [Schopenhauer] |