It is certainly possible for a student who has not taken (or not completed) *Introductory Logic* to take and successfully complete *Intermediate Logic*. Though the Intermediate Logic text is designed as a continuation to Introductory Logic, it does not assume a mastery of the concepts in it. Almost all of the concepts from Introductory Logic that are essential for Intermediate Logic are re-taught (the only exceptions being the definitions of logical argument, premise, and conclusion; definitions assumed in Intermediate Logic, Lesson 7, but taught explicitly in Introductory Logic, Lesson 19).

That being said, a new Intermediate Logic student who is familiar with Introductory Logic will have an advantage over a student who is not. The following concepts from Introductory Logic are repeated and re-taught in Intermediate Logic (the concepts are first taught in the respective given lesson numbers):

- The definition of logic (Introduction of both Intro and Inter)
- The definition of a proposition or statement (Intro 6, Inter 1)
- The parts of a conditional statement: antecedent and consequent (Intro 31, Inter 4)
- Implication (Intro 9, Inter 4)
- Logical equivalence (Intro 9, Inter 6)
- Tautology and self-contradiction (Intro 7, Inter 6)
- Validity (Intro 23, Inter 7)
- Consistency (Intro 9, Inter 10)
- Hypothetical syllogisms,
*modus ponens, modus tollens*(Intro 31, Inter 13).

Also, though not explicitly mentioned in Intermediate Logic, an understanding of the concept of counterexamples (Intro 24) is helpful in understanding how truth tables show a propositional argument to be valid or invalid (Inter 7).

Given this, I would suggest for a student starting Intermediate Logic to read through the following lessons in Introductory Logic:

Lesson 31: Hypothetical syllogisms

A familiarity with the concepts in these lessons will benefit the new Intermediate Logic student.