November 23, 2011
What made him think of something like this?
What is this picture depicting?
Cracked by Manish Achuth , Rahulk , Amarendra Kumar , jowens , Sumanth Patlolla , Rogi , badideabear , rickde , Bharath , Vishwas B Sharma , shrik , jinz , KK , Ananth and raklodramA
Answer:
As most of you figured, this is the Collatz Conjecture  as featured on an XKCD store tee.
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