Amusingly, or sadly, depending on your perspective, in practical settings the default behavior of that question depends on exactly what you want human to mean in the vocabulary of the local use case, because continuants are a very leaky abstraction if they are used to type biological systems, and while to our 'common sense' the type of human and human shaving should obviously be the same, when you get to questions about whether seemingly insignificant numerical differences in rates of catalysis constitute differences in type, then suddenly the distinction between "protein" and "protein wiggling slightly faster than usual" or "protein binding molecule a" (think "human holding shaver") becomes very much not obvious depending on exactly what question you want to answer. In the protein example if you black box the system, they can be fundamentally different. If human means predator, and your question is how dangerous is this human, then "human" and "human holding razor" becomes "agentous thing" and "agentous thing with sharp edged object" practically different things in very important ways if you are trying not to be filleted.