See, now I have to change my view on London(just a bit)!

Experts need to be better experts at expressing and presenting their findings, than what they're actually being experts at! Lie to em, but make it sound good and they'll believe you!
How is it that we can have two people, same education, with the same empirical evidence to back up their findings, come up with opposite freakin answers?
If someone could answer that for me, in either one of Canada's two official languages, perhaps I could better understand Government.