This is an extremely silly and wierd question.
https://en.wikipedia.org/wiki/Varignon%27s_theorem_(mechanics) While reading about Varignon's Theorem in wikipedia I noticed this sentence,
"If many concurrent forces are acting on a body, then the algebraic sum of torques of all the forces about a point in the plane of the forces is equal to the torque of their resultant about the same point."
Well what does "a point" specify here? Can it be any point even outside the object which we are dealing with?
Another thing, lets say we are dealing with 2 concurrent forces about a point C and the two forces are acting on A. Now according to the above theorem shouldn't the above scenario be looked as $$F_1 *AC+F_2*AC=F*CC=F*0=0?$$
Perhaps I misunderstood the theorem. As for the 1st question, I have never thought of any reference point in case of rotational motion other than the center of mass of the object and mostly dealt with uniform shapes.