Problem was: either Galileo was wrong and speeds were indeed absolute, which was apparently nonsense; or those who were measuring light speed were wrong and didn't know how to measure.
Era un problema muy grave: O Galileo estaba equivocado y las velocidades eran absolutas, lo que no parecía tener ningún sentido; o los que estaban midiendo la velocidad de la luz estaban mal y no sabían medir las cosas.