Hello Vyd,

Even if the justification is not coming from experience (a-posteriori) and is coming from science (a-priori) as in the case of your example with bus/speed, it IS a justification nonetheless. Even science is supported by reason (or justification) which is what makes its claims so credible. But how far can we really go when we are searching for justifications for every step of the reasoning? That is the problem here.