Shown is the bust of an extremely popular whiz of the 19th century who became a semi-crackpot in later years.
One of his contributions to philosophy ( to the origin of species to be precise), was a statistical concept, fondly called X.
X , was the subject of this dilbert piece.
Cracked by Hasan, and Chandrakant.
The rest were misled by the beard.
from wiki:- a hypothesized self-aware entity which arises due to random fluctuations out of a state of chaos