Combining Philosophers

All the ideas for H.Putnam/P.Oppenheim, Augustus De Morgan and Catherine Z. Elgin

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7 ideas

2. Reason / A. Nature of Reason / 6. Coherence

8616	How can multiple statements, none of which is tenable, conjoin to yield a tenable conclusion? [Elgin]

8617	Statements that are consistent, cotenable and supportive are roughly true [Elgin]

5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic

17744

De Morgan started the study of relations and their properties [De Morgan, by Walicki]

13501

De Morgan found inferences involving relations, which eluded Aristotle's syllogistic [De Morgan, by Hart,WD]

5. Theory of Logic / G. Quantification / 2. Domain of Quantification

17743

De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]

13. Knowledge Criteria / B. Internal Justification / 5. Coherentism / a. Coherence as justification

8618	Coherence is a justification if truth is its best explanation (not skill in creating fiction) [Elgin]

14. Science / D. Explanation / 2. Types of Explanation / j. Explanations by reduction

20653

Six reduction levels: groups, lives, cells, molecules, atoms, particles [Putnam/Oppenheim, by Watson]