Opinions deal with things which are subjective. Facts are objective. It is an objective fact that Sanctuary sent the dragon and hit Simians before Simians hit HoH, and yet in the post I quoted, Palem claims something else happened. Ergo, he objectively posted a falsehood. You cannot have an "opinion" about an objective fact. Something either happened in one order or the other order. It's like saying that in my opinion the sky is brown.