# Logic: An Introduction to

# the Formal Study of Reasoning

# by

# John L. Pollock

## This is a text for an introductory symbolic logic course.
It is based upon an old text that I wrote in 1969, which is long out of
print. But it modifies the approach of that book to reflect theoretical
work that I have done on theorem proving in the OSCAR
Project. The most important innovation is to formalize
the use of bidirectional reasoning. The idea behind the book is that
people use bidirectional reasoning naturally, but by making the students
aware of their use of it and having them adopt a notation that keeps
track of it, we make it easier for them to prove theorems in logic.

## At this time I have no plans for publishing this book.
There are too many logic texts already on the market to make that
useful. So it will only be web-published. Anyone who wants to use this
text is free to do so, either for their own use or as the text in a
course. I ask only that you give me any useful feedback you may have.

## To download the material:

Propositional Calculus:

Predicate Calculus:

Additional material to help in studying:

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