Let's suppose the following:
Person 1: All scientists agree that the sun is real.
Person 2: Oh yeah, why don't you list every single scientists as proof?
Here's another example:
Person 1: Humanoid lizards are not real!
Person 2: Can you list 100 peer reviewed sources to show that this is real?
Is this type of argumentation fallacious? If so, what is this fallacy called?