Admittedly, many doubters and skeptics can often come across sounding condescending and arrogant. OK . . . so that probably isn't very cool.
But the true skeptic knows he or she is not a "know-it-all". Quite the opposite-- a true skeptic knows he or she is limited in understanding. That's why we doubt. We're not sure until we get some solid evidence. And even then, we endeavor to keep our eyes open for new information that could change our perspective. At least . . . that's the goal. We don't always maintain that stance, but we try to consistently aim for that ideal.
So lets do some tests and see if we can find out if that yogi can really, honestly float.
We're not know-it-all's. We just want a bit more certainty. Until then, we maintain doubt towards unsubstantiated claims.