Confusion over the Younger Dryas climate episode?

Wikipedia notes of conflict in the explanation of the Younger Dryas catastrophe:

Skeptics of the theory have asserted that the carbon spherules originated as fungal structures and/or insect fecal pellets, and that the claimed nanodiamonds are actually misidentified graphene and graphene/graphane oxide aggregates.

Hmm, a confusion between sp2 carbon vs. sp3 carbon would seem to be easy to resolve. And scientists complain about the patent system?