PT4.S4.Q9 - A scientific theory is a good theory if it satisfies two requirements

7sagerJim

Anybody wants to shed some light on the LAWGIC aspect of this question?

Apparently, according to PowerScore explanation, the stimulus is a bi-conditional relationship because of the phrase "if it satisfies two requirements".
Therefore, the bi-conditional relationship is as follows:

Accurately Describes using a few elements AND Make Definite Predictions <---> Good theory.

Would the contrapositive of above become:

/Good theory <---> /Accurately Describes using a few elements OR /Make Definite Predictions?

Admin note: edited title; please use the format of "PT#.S#.Q# - [brief description]"

Jordan Johnson

Yes, you typed it the correct way.

When there are multiple pieces to one side of a bi-conditional, I generally picture that whole set in parentheses and negate it.

For instance, this statement:
( A + B ) <--> C
... would have this contrapositive:
/C <--> /( A + B )
... which translates to:
/C <--> /A or /B
(you always switch AND to OR, and vice versa, when determining the contrapositive using this method).

Hope that helps!