Combining Texts

All the ideas for 'Necessary Existents', 'Why Propositions cannot be concrete' and 'Interview with Baggini and Stangroom'

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8 ideas

1. Philosophy / D. Nature of Philosophy / 5. Aims of Philosophy / e. Philosophy as reason
6855 Interesting philosophers hardly every give you explicitly valid arguments [Martin,M]
2. Reason / E. Argument / 1. Argument
6856 Valid arguments can be rejected by challenging the premises or presuppositions [Martin,M]
12. Knowledge Sources / B. Perception / 1. Perception
6857 An error theory of perception says our experience is not as it seems to be [Martin,M]
18. Thought / E. Abstraction / 1. Abstract Thought
9086 The idea of abstract objects is not ontological; it comes from the epistemological idea of abstraction [Plantinga]
9087 Theists may see abstract objects as really divine thoughts [Plantinga]
19. Language / D. Propositions / 3. Concrete Propositions
9085 If propositions are concrete they don't have to exist, and so they can't be necessary truths [Plantinga]
19216 Propositions (such as 'that dog is barking') only exist if their items exist [Williamson]
19. Language / D. Propositions / 4. Mental Propositions
9084 Propositions can't just be in brains, because 'there are no human beings' might be true [Plantinga]