Hendrix the defendant pulled a knife on his sister in self defence because he though she would slap him. In this case I agree with the court.
This court case does not say you cant use the threat of force to defend yourself.
When a police officer pulls his weapon a tells you to drop your weapon that is threat of force.
If the sister had a knife a started comming at him with it saying im going to kill you, & if he pulled a gun an she stoped he would be just fine no problems with the law.
It must be reasonable Im afraid my sister will slap me doesw not give you the right to pull a knife on her.
You must be afraid for your life to pull a deadly weapon.
Just my opinion
I would love to here yours.