What is the status of the sons of those who cannot create a chazaka? The son of a robber is different form the son on a craftsman or a sharecropper. What is the case being discussed and why is the son of a robber different? A robber can’t use proof to show that he purchased land because we are concerned that he forced the owner to sell it to him or to write him a deed of sale. Exactly what kind of proof does or doesn’t work is discussed. Rav Huna says that if one forced another to sell sometihng, the sale is a good sale. The gemara attempts to prove on what basis Rav Huna holds this way. Proofs are brought from a voluntary offering (sacrifice) and from forcing a husband to give a get to his wife.