Books on Amazon
Res/Aquinas/Duns Scotus: "thing", transcendental, convertible with the beings (ens) - Brentano: Reism (late): abstractions, universals, negations, facts, forms, fictions: are not things.
Simons I 2
Chisholm: Thesis: (appearing) things (appearances) are logical constructions of objects for which the mereological essentialism applies. - Flux: Problem: changing objects cannot be regarded as identical with themselves according to the extensional mereology - Solution/Chisholm: thesis the actual are mereologically constant and the phenomena again logical constructions from immutable objects - VsChisholm: other solution: processes (with temporal parts ) instead of objects (continuants).
Simons I 120
Object/Thing/Object/Chisholm: Thesis: "Mereological constancy": objects in the original sense: - entia per se: cannot change - in the derived sense: entia per alio: subject to the flux, but only by being consulted successively through different entia per se, which differ in their parts.
Die erste Person Frankfurt 1992
Roderick M. Chisholm
Erkenntnistheorie Graz 2004
Parts Oxford New York 1987