Everything else is just a matter of degree. To quote the Stoic philosopher Seneca, who was quoting Epicurus, “The fool, with all his other faults, has this also: He is always getting ready to ...
A nonaffine displacement is a swerve in the trajectory of an atom, which thus deviates from the trajectory prescribed by the externally imposed deformation (akin to Epicurus's "clinamen," if you ...