When, geometrically, do you know you have BI?

[Raymond]

Originally Posted by referee99

Rut, if the ball was pinned by the defender on the gaudy red X in the image in the OP, can we agree that the defender may be touching the ball while the ball was in the imaginary cylinder with the basket as its base?

That would be goaltending, not BI. As JRut has said, the backboard has nothing to do with BI.