Hi!

I am really struggling with how to negate conditional statements when they appear in the answer choices of necessary assumption questions.

For instance, a few that appeared in recent LSATs.

PT71 S1 Q22: Answer Choice E: Any pricing practice that does not result in unreasonable prices should be acceptable.

The Powerscore Logical Reasoning Bible says to add a "not" to negate, but I'm not sure where to add the not. Also, does any turn into some?

PT73 S4 Q26: Many farmers will not grow green manure unless they abandon the use of chemical fertilizers.

PT77 S4 Q26: (wrong answer choice): Sea Creatures have rarely if ever, wreaked ecological havoc in a new habitat unless they have been able to survive in that habitat after having been deposited by oceangoing ships.

Each time I struggle with such answer choices because I am unsure of how to negate them.

Thanks!

Admin Note:

https://classic.7sage.com/lsat_explanations/lsat-71-section-1-question-22/

https://classic.7sage.com/lsat_explanations/lsat-73-section-4-question-26/

https://classic.7sage.com/lsat_explanations/lsat-77-section-4-question-26/

I have a question on wording.

If a statement says something along the lines of: Physics students are more likely to do well on the LSAT than Chemistry Students.

Does this indicate correlation or causation? Specifically, what does the phrase "more likely" mean on the LSAT in such contexts.

Another question: As "x" increases, y increases. --> does this indicate correlation or causation?

I have been so confused on this. Thank you so much