Expert: A group of researchers claims to have shown that for an antenna to work equally well at all frequencies, it must be symmetrical in shape and have what is known as a fractal structure. Yet the new antenna developed by these researchers, which satisfies both of these criteria, in fact works better at frequencies below 250 megahertz than at frequencies above 250 megahertz. Hence, their claim is incorrect.
The reasoning in the expert's argument is flawed because the argument contradicts itself by denying in its conclusion the claim of scientific authorities that it relies on in its premises.