[chc]

How much have you studied leprechauns? Do you feel qualified to comment on them? What would you think of me if I insisted that leprechauns were behind all the major world events of the last decade?

There are lots of things we can't prove or disprove, and it's good to acknowledge that. But that doesn't make ideas based on huge logical leaps and not much evidence reasonable. It's possible (in the sense of not impossible) that leprechauns are real and do manipulate human history, but the reasons anyone would think so right now are so paltry that even if it did somehow turn out to be the case, the people who supported the theory right now would still not seem any more credible than a broken clock.

[mindslight]

I would honestly be interested in the first 0.5-10 minutes of your leprechaun theory (depending on beer consumption, and if I'd heard similar things before), then I would try to change the subject and hope that there was more to you. And the same would apply if you were to go on a rant about how people who take joy in the idea of leprechauns are positively stupid.

It's not that true/false are equally credible, it's that assertion of either one starts off utterly non-credible. Extraordinary claims require extraordinary evidence and all that. This applies to proving the existence of leprechauns. But it also applies to positively disproving the existence of (a specific definition of) leprechauns, especially with the goal of using that result to imply something else.

Insisting the definitiveness of either take on a middleground is akin to rooting for sports teams (not that that isn't fun, but don't think you're helping spread truth).