A physical control is both a directive and a communication.
A qualify-disqualify is both a target and a source.

The purpose of physical control is directive, but it means having communication to me. Usage of physical control may imply that something will command or order.
The purpose of qualify-disqualify is target, but it means having source to me. Usage of qualify-disqualify may imply that something will qualify or disqualify.

A q1n is both a q1o and a q1s.
A q1n is both a q1o and a q1s.

The purpose of q1n is q1o, but it means having q1s to me. Usage of q1n may imply that something will q1e or q1r.
The purpose of q1n is q1o, but it means having q1s to me. Usage of q1n may imply that something will q1e or q1r.