How Close Are We?
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A Beginner's Guide to Mathematical Logic
Raymond M. Smullyan
The Boy Who Would Live Forever: A Novel of Gateway
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An Introduction to Theories of Learning
B. R. Hergenhahn & Matthew H. Olson
Dialectical Theology and Jacques Ellul: An Introductory Exposition
Jacob E. van Vleet
English Syntax and Argumentation
Bas Aarts
Macmillan Modern Linguistics (1)