Newspaper subscriber: Arnot's editorial argues that by making certain fundamental changes in government we would virtually eliminate our most vexing social ills.
Conclusion
Making certain changes in government would not virtually eliminate our most vexing social ills.
Evidence
The argument Arnot makes for this claim depends on a dubious assumption, that the government can be trusted to act in the interest of the public.
Evaluate
It's easy to get sucked into the content of this conversation and start thinking,
But all LSAT wants us to notice is that the author has concluded that a claim is false because the argument made for it contained a dubious (potentially untrue) assumption.
I could argue
You might respond,
But you're not allowed to now conclude, with certainty, The fact that you poked a hole in my argument doesn't mean that you've proven the opposite.
Goal
Look for an answer describing the famous Unproven vs. Proven False flaw.