Bi condition rules

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• 1 Like

  Matt Sorr Alum Member ⭐

  September 2022 2245 karma

  Have you watched the core curriculum videos on biconditionals? JY lists the phrases that the LSAT writers use to express biconditionals. I also struggled to recognize them for a while, but after reviewing the videos for a little bit I’ve had a much easier time. If I recall correctly, I actually think JY mentions every single know biconditional phrasing that has appeared on the LSAT.
• WinningHere Member

  September 2022 edited September 2022 417 karma

  Agree with @"Matt Sorr" wholeheartedly. I struggled recognizing them also, but am much more familiar so it can be done. You could also search in discussion for comments on the topic.
• 3 Likes

  anonymous8 Alum Member

  September 2022 85 karma

  There's an awesome biconditional lesson in the core curriculum of 7 sage that you should definitely check out. But if you just need a quick reference. Here are the two most popular biconditionals: 1.) forever together 2.) forever apart.

  1.) Forever together:
  If you have one item, you must have the other. They are always together. Never apart.

  Key indicators:
  If but only if
  if and only if
  if yet only if

  Example: Alan attends the meeting "if and only if" Chris attends the meeting.
  A <-> C

  To understand it better, try breaking down the biconditional as follows:
  Alan attends the meeting "if" Chris attends the meeting.
  C ->A
  Alan attends the meeting "only if" Chris attends the meeting.
  A->C
  Now put them together "if and only if" is combined as the biconditional: A <-> C

  2.) Forever apart:
  If you have one item, you don't have the other. They are always apart. Never together.

  Key indicators:
  (either) or, but not both.

  Example: Alan or Chris goes to the park, but not both.
  /A <-> C

  To understand it better, try breaking down the biconditional as follows:
  Alan "or" Chris goes to the park.
  /A -> C
  Alan and Chris "cannot both" go to the park.
  A -> /C
  Now put them together "or, but not both" is combined as the biconditional: /A <-> C