That's your problem. Vlad says you need an argument for each and every one of the things you don't believe in, but leprechauns specifically.
Actually, it seems odd to me that he hasn't posted his arguments here yet. Maybe he has a particularly matte turd that needs polishing.
It all boils down to the same argument. It doesn't take too long.
Having not seen one, I want evidence outside human experience that cannot be falsified and is reliable.
Depending on what there is determines if I believe it exists. It's all shades of grey really.
Leprechauns, unicorns, fairies, Nessie , I don't think the sort of evidence exists therefore I don't think they exist.
Dinosaurs I believe existed because there is enough evidence, all over the world, from different sources.
As I come across and read new ones, I make choices based on what I can find out.
Sometimes I make choices based on how likely it is.
Life on other planets for example. Which I think is very likely.
But a lot of the arguments are still subjective.
It depends what you use to support the arguments.
With leprechauns, they are most unlikely, one of their attributes is being all male.
How do you get little leprechauns for a start ?
And why are they always old with a ginger beard?
And why are they all cobblers, tapping out minute shoes?
So is it likely there is a species of male only, short, ginger bearded, drunken cobblers, with a pot of gold?
Not to mention the world that then opens up with who they are making shoes for.........?
I think the only place you might find such a congregation of males talking cobblers while drunk ,matching those features might be at some football stadiums
But I'd best not generalise