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Language, Proof and Logic

Both physical and online packages contain one non-transferable registration key which permits access to:

  • Four web applications: Tarski's World, Fitch, Boole and Submit
  • the Grade Grinder, permitting online assessment of exercises from Language, Proof and Logic
  • 328 exercise files
  • The Language, Proof and Logic text book and software manuals in PDF format

The physical package also contains the textbook and software manual in book format.

Note: the PDF versions of the textbook are frequently updated, while new editions of the physical books are infrequent. We recommend use of the PDF versions for studying, even if you purchase the physical package.

The physical book is also available in Portuguese, German and Japanese translations. Translated PDFs are not available.

Logical Reasoning with Diagrams and Sentences

Both physical and online packages contain one non-transferable registration key which permits access to:

  • Two desktop applications: Hyperproof and Submit (for Windows and Macintosh)
  • the Grade Grinder, permitting online assessment of exercises from Logical Reasoning with Diagrams and Sentences
  • The Logical Reasoning with Diagrams and Sentences text book in PDF format
  • 335 exercise files
  • Lifetime upgrades of the software

The physical package also contains the textbook in book format.

Note: the PDF versions of the textbook are frequently updated, while new editions of the physical books are infrequent. We recommend use of the PDF versions for studying, even if you purchase the physical package.

Tarski's World

Both physical and online packages contain one non-transferable registration key which permits access to:

  • Two web applications: Tarski's World and Submit
  • the Grade Grinder key, permitting online assessment of exercises from Tarski's World
  • 72 exercise files
  • The Tarski's World (Revised and Expanded Edition) text book in PDF format

The physical package also contains the textbook in book format.

Note: the PDF versions of the textbook are frequently updated, while new editions of the physical books are infrequent. We recommend use of the PDF versions for studying, even if you purchase the physical package.