What dose "Imperfect" heuristic mean

[Riptide-Scratch]

You know when interpolation was still an experiment and it said it used an imperfect heuristic or something, is it purposely imperfect or does it mean that it had room for improvement?

[GarboMuffin]

The interpolator uses a simple heuristic to determine whether a sprite movement should be interpolated or instantaneous. As imperfect as it is, it works well enough for most projects. Making a perfect heuristic for this is (almost certainly) impossible.