Khullin 9-10 What is presumptive status חָזָקָה in Jewish law?

 Dappim TB Khullin -10 discusses the role of presumptive status, חָזָקָה -khazaka, when determining halakha.  Ultimately the Gemara concludes that Rav Hunah’s position is accepted as the halakha. “Rav Huna, who says: An animal during its lifetime exists with the presumptive status of prohibition, as it is prohibited to eat a living animal, and it continues to have this status even after its death until it will become known to you in what manner it was slaughtered, i.e., whether it was properly slaughtered. Once the animal was slaughtered, it exists with the presumptive status of permissibility until it will become known to you in what manner it was rendered a tereifa.” (TB Khullin 9a, Sefaria.org translation)

According to the Rishonim the meaning of the word  comes from that language אָחִיזָה, to hold on to as in the case of a person who holds onto a piece of property for many days has the presumption of ownership and another party cannot claim it as his. Unlike today when holding onto a deed is easy, back in Talmudic times a person was only expected to be able to hold onto a deed for three years. After three years the presumptive status of the land is his even without the deed.

There are many different sub categories of khazakot and the Rishonim divide them into two major categories. The first category is a khazaka that has no terminal end time. This presumption takes the place of witnesses and is based on what the majority of people actually do. An example would be the assumption that a man does not pay off his debt before it’s due because the majority of people don’t pay their debts before they are due. The second category is a khazaka that the presumption is temporary. The presumption status of a single woman or a married woman remains the same until there is a change like a wedding or a death.

Among the many subcategories the most common the Hatam Sofer lists are the following three.

1. חֶזְקַת מִנְהָג-The presumption of a habitual practice. The example would be a man doesn’t pay off is debt until it’s due because the majority people don’t pay off their debts before they are due.

2. חָזָקָה -The presumption of an established pattern i.e. something that happens at least three times. An example of this would be a forewarned ox. A shor muad  (Hebrew: שוֹר מוּעָד) is a “forewarned ox” in Jewish law, specifically an animal known to be dangerous, usually after goring three times. Unlike a shor tam (innocent ox), the owner of a shor muad is liable for full damages (or death) because they were warned and failed to properly guard the animal

3. חֶזְקַת הָגוּף-The presumption of inertia of a known entity will continue until otherwise proved. Has the reality really changed? An example of this would be a parent bringing a child claiming to be his son or daughter to a new city would be accepted as the parent until proven otherwise.