What are the definitions of the various types of witchcraft mentioned in the Torah? Why is baal ov and yidoni mentioned in this mishna but in the mishna in critut only baal ov is mentioned? Rabbi Yochanan and Reish Lakish offer two different answers. Their opinions are analyzed in the gemara. What is considered an action? Generally one is only obligated for actions, according to the rabbis. How much of an action is needed to obligate one? Is moving one’s lips an action? Bowing to an idol? Rabbi Akiva obligates even without an action – but does he include any non-action? Or does he have some minimal criteria?