Other people have provided good answers, but I&#x27;m just gonna add another link explaining Y Combinator ``Why of Y&quot; by Matthias Felleison[1] , which is so far my favorite explanation.<p><a href="https:&#x2F;&#x2F;xivilization.net&#x2F;~marek&#x2F;binaries&#x2F;Y.pdf" rel="nofollow">https:&#x2F;&#x2F;xivilization.net&#x2F;~marek&#x2F;binaries&#x2F;Y.pdf</a>