Grimm's law
The law has sparked discussions about its chronology in relation to Grimm's law and Verner's law. The problem is that the traditional ordering (1. Grimm, 2. Verner, 3. Kluge) cannot account for the absence of voice in the Proto-Germanic geminates. Therefore, it has been proposed to rearrange the order of events so that the Proto-Germanic geminates' loss of voice may be equated with that part of Grimm's law that turns mediae into voiceless tenues. This would mean that characteristics noted in Kluge's law happened before (or between different phases of) those of Grimm's law. If accepted, this has further consequences, because those characteristics of Verner's law must in fact, precede those of Kluge's law, or otherwise it can not be explained why both the reflexes of PIE voiced aspirated plosives and PIE voiceless plosives underwent the changes characteristic in Kluge's law. Consequently, this would put Verner's law chronologically in the first position, followed by Kluge's, and finally by Grimm's law.