Combining Texts

You have chosen 'Open Society and Its Enemies:Hegel and Marx' by Karl Popper, 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo and 'The Principles of Art' by R.G. Collingwood

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All the ideas for Theory of Logic, or select a subheading:

	A.	Overview of Logic
	B.	Logical Consequence
	C.	Ontology of Logic
	D.	Assumptions for Logic
	E.	Structures of Logic
	F.	Referring in Logic
	G.	Quantification
	H.	Proof Systems
	I.	Semantics of Logic
	J.	Model Theory in Logic
	K.	Features of Logics
	L.	Paradox