Combining Texts
Ideas for
'fragments/reports', 'Elucidation of some points in E.Schrder' and 'Scientific Essentialism'
expand these ideas
|
start again
|
choose
another area for these texts
display all the ideas for this combination of texts
2 ideas
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / h. System S5
13604
|
Real possibility and necessity has the logic of S5, which links equivalence classes of worlds of the same kind [Ellis]
|
4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set
14238
|
A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege]
|