In your conclusions, you talk about discernment. You say that most participants had difficulty distinguishing between truth and falsehood, but that in general, most of them had a false belief bias, meaning they were more likely to say something was false, even if it wasn't. I find that somewhat positive, in a way, because it suggests that people are inherently suspicious of the content they see.
We keep telling people to check their sources. Do you conclude that this bias means that we may be on the right track and that the message is starting to get through?