"A&F" is a nonsensical concept anyway, just words that end up meaning nothing except what you decide they will. Every practitioner of a religion is convinced that his answer to the great mysteries of the universe is absolute and final, and as often as not, that that finality justifies his killing, displacing, or enslaving those who disagree. Nothing in what you say other than your own declaration can convince anyone else that this time you have it right. This is true even if your particular outlook is kind and serene. It is very possible occasionally to do the right thing for the wrong reasons.
In the mean time, the demand that nothing can be declared unless everything is "A&F" is monumentally ridiculous, as it means that nobody can know anything about anything. It's true enough that science is not absolute and final, and yet we still expect the sun to rise in the morning, and when we drop a rock we can confidently expect it to fall down, not up.
The fact that we do not know everything does not mean that we know nothing, and the notion that the incompleteness of our knowledge allows us to believe whatever unproven nonsense comes along is not only a mush brained notion, but a large contributing factor to why this world is a shabby place filled with war, famine, corruption and irresponsibility. That is true even if your particular brand of mush is better tasting.