In many other forums people get annoyed if you ask a question that has already been asked.. so I just wanted to check before I posted!
PT 66 Section 4 Question 20.
Conditionals aren't usually an issue for me but I had trouble interpreting "Without such marketing we will be unable to increase our enrolment"
when I draw out the conditional, not following any particular rule but in a way that makes sense from reading, I get "/M --> /IE" or "IE --> M" .. which is right I believe?
However, when I try and use lawgic I mess it up.. negate sufficient (using without as an indicator) /M --> IE or /IE --> M
does the word "unable" mean that IE is negated as well? .. but then if that is the case if I picked IE as my negate sufficient word I would get IE --> /M
Not sure why this conditional in particular is giving me so much trouble.. think I'm having a brain fart.
Unable is a negation. So either use that as a group four negate necessary and use the without as a negation, or use without as a group three negate sufficient and use unable as a negation. In doing so you either get what you originally thought it was, or the contrapositive.
In your last example you would not negate M in the necessary because you're already using up the without as a group three indicator. A word cannot serve as both an indicator and as a negation.
Comments
PT 66 Section 4 Question 20.
Conditionals aren't usually an issue for me but I had trouble interpreting "Without such marketing we will be unable to increase our enrolment"
when I draw out the conditional, not following any particular rule but in a way that makes sense from reading, I get "/M --> /IE" or "IE --> M" .. which is right I believe?
However, when I try and use lawgic I mess it up..
negate sufficient (using without as an indicator) /M --> IE or /IE --> M
does the word "unable" mean that IE is negated as well? .. but then if that is the case if I picked IE as my negate sufficient word I would get IE --> /M
Not sure why this conditional in particular is giving me so much trouble.. think I'm having a brain fart.
In your last example you would not negate M in the necessary because you're already using up the without as a group three indicator. A word cannot serve as both an indicator and as a negation.