The first definition of “falsifiable” means that it’s easy to fake—if a Patronus is falsifiable under this definition, you don’t get much information when you see a Patronus, since it could easily be something else and you couldn’t tell the difference.
The second definition of “falsifiable” means that it’s easy to prove that it’s not fake—if a Patronus is falsifiable under this definition, you get a lot of information when you see a Patronus, since it is very difficult for something that looks like a Patronus to actually be a fake.
Because the two defintions are pretty much opposites, between them they cover everything—the ones that are easily fakeable and the ones that are not easily fakeable.
The first definition of “falsifiable” means that it’s easy to fake—if a Patronus is falsifiable under this definition, you don’t get much information when you see a Patronus, since it could easily be something else and you couldn’t tell the difference.
The second definition of “falsifiable” means that it’s easy to prove that it’s not fake—if a Patronus is falsifiable under this definition, you get a lot of information when you see a Patronus, since it is very difficult for something that looks like a Patronus to actually be a fake.
Because the two defintions are pretty much opposites, between them they cover everything—the ones that are easily fakeable and the ones that are not easily fakeable.
Aha! Thank you!
My mistake was that I kept thinking about “false” as in “false theory” instead of “false” as in “false money”.