QUESTION $40$

The $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ meaning$$ of a word is the members of the class that the term denotes.$$

a$.$

stipulative

b$.$

intensional

c$.$

extensional

d$.$

cognitive

Assume that the following proposition is TRUE$$All difficult tasks are jobs that are worth doing$.$ What can be claimed for the following proposition?

No jobs that are worth doing are difficult tasks

a$.$

true

b$.$

false

c$.$

undecided

d$.$

valid