One who is half-slave and half-free man (one of the two owners emancipated his share) works one day for his master and one day for himself – says Hillel school.

Shammai school says: You have solved his master's dilemma, but you have not solved his own. For it is impossible for him to marry a slavewoman, because half of him is already a free man. And it is impossible for him to marry a free woman, because half of him is still a slave. And Hillel school reversed itself to rule in accordance with the words of Shammai school.