The Taz was a son-in-law of the Bach, who wrote a commentary on the Tur. There are several interesting stories about the relationship of the Bach and his son-in-law, the Taz. When the Taz married the Bach’s daughter, the Bach promised that he would support the Taz and provide him with meat on a daily basis to ensure that the Taz would have the strength to learn at full capacity. One day, the Bach sent liver instead of meat. There is a machlokes regarding this matter. Since the liver is primarily comprised of blood, some opinions hold that it is not fleishig. The Taz took his father-in-law to beis din to receive a judgment as to whether liver was considered meat. The Taz explained that he did so because he wanted to make sure that he would be able to keep his promise to learn at full capacity. He worried that if liver is not considered meat, he would lack the strength needed to learn at his highest capacity. If he would receive a p’sak that liver was considered meat, he would feel confident that he would be able to reach that potential.