This Mother Not A Chicken

If we doubt we have the right number for the speed of light or the length of a wavelength,

$f=\cfrac{c}{\lambda}=\cfrac{8^2}{3}\pi=67.02\,Hz$

there is no reason to believe that we have defined the length of a second correctly either.

What happens at $67.02\,Hz$?  Only after we have this per second period defined, can we define $\lambda$ and so $c$.

The egg stops here...