Combining Philosophers

All the ideas for Oswald Veblen, Hugh MacColl and J Hoffman/G Rosenkrantz

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6 ideas

2. Reason / B. Laws of Thought / 6. Ockham's Razor

8964	Entities can be multiplied either by excessive categories, or excessive entities within a category [Hoffman/Rosenkrantz]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

21548

The null class is the class with all the non-existents as its members [MacColl, by Lackey]

5. Theory of Logic / A. Overview of Logic / 2. History of Logic

10247

We have no adequate logic at the moment, so mathematicians must create one [Veblen]

8. Modes of Existence / D. Universals / 4. Uninstantiated Universals

8962	'There are shapes which are never exemplified' is the toughest example for nominalists [Hoffman/Rosenkrantz]

8. Modes of Existence / E. Nominalism / 1. Nominalism / a. Nominalism

8961	Nominalists are motivated by Ockham's Razor and a distrust of unobservables [Hoffman/Rosenkrantz]

10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds

8963	Four theories of possible worlds: conceptualist, combinatorial, abstract, or concrete [Hoffman/Rosenkrantz]