Which one of these sentences is a necessary falsehood?

[P1] If today is Tuesday, then Megan is fixing her car. [P2] Today is Tuesday. [C] Therefore, Megan is fixing her car. This argument is

Which one of the following is correct about arguments (8) and (9) (which are on p. 7)?

[P1] All human beings need oxygen to survive. [P2] Greg Johnson (the instructor of this course) is a human being. [C] Therefore, Greg Johnson needs oxygen to survive. This argument is

Which one of the following is the English translation for C -> D?

Which one of the following is the definition of necessarily equivalent?

Constructive play is 

All of the following statements are true of the Running Record EXCEPT

An advantage of a checklist is that it is an open method.

A checklist is