Of course. That's kind of the point of the question.
Are you saying you've seen invisible things?
If someone reported seeing a Brown Booby off the coast of Texas, I'd have no problem accepting it as fact based on authority. If someone reported a Brown Booby in Central Texas, I'd require either a photograph, or that the reporters credentials were immaculate. So yes a somewhat out of the ordinary claim can at times be accepted based on authority. IF someone reported a Blue Footed Booby in Texas, authority would be out of the question. Photographs and field notes would be required to accept the record. Authority would be completely insufficient. Even the most renowned ornithologist would understand this and it would give a lot of impetus to search for that particular bird and properly document it.
Just two days ago I came across a Diamond Back Terrapin at Powderhorn Ranch. There had been reports of the nearly extinct species in this area. One of the biologists had been frantically searching and even setting traps to document the presence of this species in this area. There have been 100s of verbal accounts. My friend, the TPWD biologist immediately jumped in his vehicle and drove 1/2 hour to meet me to photograph the Terrapin, weight it, take measurements, and make field notes. Until 2 days ago the presence of Diamond Back Terrapins at Powderhorn was only a myth, a fable, a rumor. Today it is documented fact, history, knowledge.
Now, what standard of truth do you think I'd use if someone claimed they saw a Phoenix, or a Pterodactyl, or an angel flying around south Texas?
To repeat your question in a different context;
If you see a Pterodactyl flying around South Texas, and you have no evidence to prove it exists; Wouldn't you consider it ignorant of them not to tell you've lost your mind, or imagined it, or didn't know what you were talking about, or don't know the difference between a Pterodactyl and a Brown Booby?