As highlighted in [44], the performed a very meticulous analysis and characterized the time-course of the action potential phe nomenally terms of different features (the concise listing taken from [44])
the form, amplitude, and threshold of an action potential;
the form, amplitude, and velocity of a propagated action potential;
the form and amplitude of the resistance changes during an action potential;
the total movement of ions during an action potential;
the threshold and response during the refractory period;
the existence and form of subthreshold responses;
the production of action potentials after sustained current injection (that is, anodal break);
the subthreshold oscillations seen in the axons of cephalopods
”A measurement can be precise without being accurate.”[2] Accuracy means characterizing the true measurable quantity. In this sense, their measurement is precise but not accurate: they measured precisely wrong quantities, which, unfortunately, can be made and thought sufficiently resemblant to the real ones.