PT150 · S2 · Q5 Lawyer: In a risky surgical procedure

This principle only allows us to conclude that a medical team could be charged with manslaughter. But this conclusion we're trying to justify is that the medical team is guilty of manslaughter.

This is a rule that would only allow us to conclude someone isn't guilty of manslaughter, but not that someone is guilty of manslaughter. The "only if" is modifying patient dies. Guilty of manslaughter → patient dies So this rule tells us that, "if the patient doesn't die, then you're not guilty of manslaughter". But it doesn't give us a way to prove you are guilty of manslaughter. Consider a real world parallel, If someone is applying to Harvard with a 160 LSAT, then only if they have an amazing personal statement will they be accepted. That gave us a mechanism for proving you wouldn't be accepted (applying w/ 160 + don't have amazing personal statement), but nothing in there allows us to guarantee someone will be accepted.

Once again, this answer can only prove "one is not guilty of manslaughter", because they have "guilty" on the left side of the arrow. "Only when" = "Only if" = necessary, put on RIGHT Guilty of manslaughter → intends to cause ... Any time you see your Conclusion show up on the left of the arrow, you know it's wrong. We could stop reading when we hit the "only when". If we kept reading, of course, we would also see that the 2nd half of this answer doesn't match the conversation. No doctor in this stimulus was intending to cause irreversible loss of life.

"Unless" = we need to take either half of this sentence and put its negated form to the Left of the arrow (that's why we often use the shorthand if-not to talk about what we do with unless). The second half of the sentence is a complex idea (X and Y), so if you're putting the negated form on the left, you need to put (~X or ~Y). We can otherwise take the easier route and choose to put the negated version of the 1st idea on the left. intentionally stopping patient agrees life functions not → and manslaughter might die w/o treatment The contrapositive is where we would get our conclusion on the right of the arrow, where we need it. patient doesn't agree intentionally stopping or → life functions is not risking death by manslaughter avoiding treatment The right side looks good, but we don't have match for either of those Trigger ideas.