Tag Archive: condition

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Mistaking the Necessary and Sufficient Conditions

A question on the Top Law Schools message board caught our eye this week:

Is there a difference between ‘mistaking the sufficient condition for the necessary condition’ and ‘mistaking the necessary condition for the sufficient condition’? I can sort of see a difference, but I feel like it could be phrased either way and still be the same flaw.

This is a great question.  As it turns out, the two things have slightly different meanings.  If you mistake the sufficient condition for the necessary condition, you treat the thing that really is the necessary condition as if it were the sufficient condition.  If you mistake the necessary condition for the sufficient condition, you treat the thing that really is the necessary condition as if it were the sufficient condition.

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The Keys to Becoming an LSAT Diagramming Master

Diagramming is an essential skill on the LSAT, but it’s also a bit like speaking a foreign language. At first you will feel awkward and clumsy and slow; then suddenly you’re spitting out full sentences and fully understanding the answers and you wonder why you ever had such a problem with it.

What is diagramming and why is it important on the LSAT?

Diagramming is a shorthand way of representing conditional statements (otherwise known as if-then statements). I don’t have enough space to fully get into the basics here, but if you’re studying for the LSAT and you’re not comfortable or familiar with conditional logic, you should do yourself a solid and look it up.

Diagramming crops up mainly on the Logical Reasoning sections and on Logic Games (for instance, Tanika is in every photo that Morlanda is in).