Very enjoyable.<p>However, I think I found a mistake:<p>&quot;For example, ‘5 tetrated to the 3’ means 5 raised to its own power 3 times, or 5^5^5&quot;<p>(I am paraphrasing slightly here because the essay uses an image to show 5^5^5 in normal notation (<a href="http:&#x2F;&#x2F;www.scottaaronson.com&#x2F;cgi-bin&#x2F;mimetex.cgi?5^{5^5})" rel="nofollow">http:&#x2F;&#x2F;www.scottaaronson.com&#x2F;cgi-bin&#x2F;mimetex.cgi?5^{5^5})</a>)<p>However, shouldn&#x27;t this be 5^5^5^5, if we&#x27;re raising 5 to its own power three times?