Determine if the argument is valid and justify.
1) Students must show up to the final or they will receive a grade deduction.
2) Charlie didn’t receive the grade deduction.
∴ Charlie showed up to the final.
Contrapositive reasoning; If I get popcorn, then I finished my homework.
Transitive reasoning (Law of Syllogism); If I finish my homework, then I’ll get popcorn
Modus ponens; If I go to the movies, then I’ll get popcorn.
Disjunctive syllogism; I finish my homework or get popcorn