The record belongs to the meeting.

Two waves can reinforce or cancel according to their relative phase. The recorded pattern is a consequence of their relation. It is not a little drawing of either wave alone.

Holographic recording uses interference between object and reference light to preserve information needed for reconstruction. The reference is part of the method, not an ornamental witness.

One everyday echo of the idea: the same statement arrives differently when its context changes. That is a metaphor about communication, not an equation for influencing reality.