There are all these objects that orbit the sun and they have a wide range of sizes and compositions and orbital parameters.
Well, sure, the question is if there's a description that applies to the eight and only to the eight (or ten... but 53?), and if there's such a description that isn't entirely arbitrary.
It would make sense to impose some kind of mass threshold, but even that would be arbitrary.
I gather that the proposed definition includes "massive enough to be round", which seems like a reasonably non-arbitrary threshold to me. ...but inadequate to cut out enough objects.
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Well, sure, the question is if there's a description that applies to the eight and only to the eight (or ten... but 53?), and if there's such a description that isn't entirely arbitrary.
It would make sense to impose some kind of mass threshold, but even that would be arbitrary.
I gather that the proposed definition includes "massive enough to be round", which seems like a reasonably non-arbitrary threshold to me. ...but inadequate to cut out enough objects.