Vlad,
Yes but you have only asked me to say how I would go about it.
Yes, and the answer is incompetently. That's the point - you can no more falsify leprechauns than you can falsify "God", despite your assertion to the contrary.
A comprehensive search of the world through all means possible I.e. surveying every inch of the planet by CCTV surveillance and all the present means could show there weren't any.
No, it would just show that - according to the equipment and techniques available to you - there aren't any. You have a basic conceptual problem here: not being able to find something and that something not existing are not synonymous. Think bacteria pre-microscopes.
If you meant falsify them now or suggest I'm going out to prove them non existent you've deliberately muddied the waters.
Then you think wrongly. It's anything but muddying the waters to show you that "God" and leprechauns alike are unfalsifiable. What that means is that the NPF "works" equally for both - which should tell you that it's probably a bad argument.
They are falsifiable because they are small green men. You dodged round that with a red herring.
And still you don't grasp the basic problem. Small and green, curing little Timmy of shingles, whatever - these are just properties. They have no relevance whatever to the fact that you cannot falsify either.
However you were seen through again.
Actually you were - again.
In terms of a flit to mars.........I suggest you take one.
Your defeat (again) is acknowledged.