  If $X_{\lambda}$ is a smooth member of the Dwork family over a perfect field
$k$, and $Y_{\lambda}$ is its mirror variety, then the motives of $X_{\lambda}$
and $Y_{\lambda}$ are equal up to motives that are in coniveau $\geq 1$. If $k$
is a finite field, this provides a motivic explanation for Wan's congruence
between the zeta functions of $X_{\lambda}$ and $Y_{\lambda}$.
