For Sheldon to be a Taurus he would have to have been born between April 20 and May 20, which true fans will know cannot be the case.
It seems even showrunners may have spotted the plot error, as later in season eight Penny correctly refers to Sheldon as a Pisces.
However, the continuity error didn’t go a miss from die hard fans of the show, with one user taking the matter to Reddit.
One user posted: “Wait, how the hell can Sheldon be both a Taurus and a Pisces? Penny switches between the two halfway through the show.”