“…Jost's law finds no greater confirmation than these subjective interpolations, many of which had their rise in the act of learning when the observer perceived the material, his associations growing progressively stronger than those artificially presented by the experimenter. 10. In addition to the mechanisms which we have described as being essentially constituent processes of forgetting, namely typification, analysis, condensation, transposition, and elaboration, all included under the processes of dissociation and assimilation, there are at least two mechanisms which indicate the presence of forgetting for reason of the very fact that they resist forgetting and they change forms in the course of time due to the effects of forgetting on them; they are the mechanisms of certainty and uncertainty, and acceptance and rejection.…”