Is white privilege real? To what extent?

[Edwardo Piet]

And then the false allegations, repeated allegations that I don't believe white privilege exists because I question the extent and definition of it.

(my bolding)

Questioning the definition of it is to equivocate it. When you define something differently you are no longer talking about the thing originally defined.

You can 'question the definition' of X all you want but once you do remember now that we're talking about X2 instead of X and no matter how true the things you say about X2 it has no bearing on X.

If you redefine 'white privilege' because of your rigid attachment to specific dictionary definitions of the word 'privilege' -- that unsurprisingly also happen to suit your own opinions on white privilege (*cough* confirmation bias *cough*) -- it doesn't change the reality of the fact that white privilege actually exists in the world.

You can talk about "white privilege" the concept all you want but it doesn't change the reality of white privilege itself. White people are generally going to be privileged however you define it.