It seems pretty reasonable. Basically, barring further evidence, all the evidence points to Eris as being a dwarf planet, because objects larger than Pluto almo

It seems pretty reasonable. Basically, barring further evidence, all the evidence points to Eris as being a dwarf planet, because objects larger than Pluto almost certainly meet the other criteria. The IAU is allowing other object to be listed as dwarf planets if it's a very strong likelihood that they are, without having to send a probe to each one.