Either result would imply the existence of other new, perhaps even more fundamental particles — and the need for accelerators to chase them as well.

The terms horizontal (h) and vertical (v) imply the existence and direction of reflections with respect to a vertical axis of symmetry.

This follows from the idea that existentially quantified statements have existential import (i.e. they imply the existence of something) while universally quantified statements do not.

Propagation of waves in a true vacuum would imply the existence of electric fields without associated electric charge, or of electric charge without associated matter.

In a bidirectional universal two features each imply the existence of each other.