A quick definition of abjure:

Abjure means to formally give up or avoid something, like renouncing citizenship or abstaining from civic duties. A fact is something that is true or actually happened, like a person's opinion or a crime committed. There are different types of facts, like evidentiary facts that help prove other facts, or dispositive facts that cause the loss or gain of rights. Ultimate facts are essential to a claim or defense, while collateral facts are not directly related to the issue at hand. Private facts are not public knowledge, while public facts are.