Wilhelm
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# 20 Actions

 Jan 29 awarded Yearling Apr 28 awarded Notable Question Sep 10 awarded Good Question Nov 12 awarded Yearling Aug 3 awarded Popular Question Jul 20 awarded Nice Question Dec 11 awarded Quorum Dec 9 awarded Precognitive Jul 28 awarded Teacher Jul 27 awarded Beta Jul 23 comment Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$? Only problem I see with these, is that when one is shaky on the laws simplifying might be a problem. Jul 22 awarded Student Jul 22 awarded Scholar Jul 22 accepted Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$? Jul 22 comment Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$? Well sqrt(-25) / sqrt(-1) = 5, so the explanation doesn't seem quite complete. Jul 22 asked Why $\sqrt{-1 \times {-1}} \neq \sqrt{-1}^2$? Jul 22 comment What can we conclude from correlation? Not really what you wrote. You wrote that "people become right handed as they grow older" which either means age -> right-handedness or age <-> right-handedness. But if there is another factor that influences both, those statements may be false. With the question as stated nothing can be concluded, more information is needed. Or do you believe in en.wikipedia.org/wiki/Paul_the_octopus ? Jul 22 answered What can we conclude from correlation? Jul 22 answered Are the “proofs by contradiction” weaker than other proofs? Jul 22 awarded Supporter