Is terrorism ever justified?

In the light of the current state in philosophy, do skeptics still get an upper hand? Can we really know anything with certainty?

Moral disagreements seem to suggest that there may be an objective moral truth out there but it seems next to impossible to discern about it. Is there a way out of intractably difficult moral disagreements so that both opposing sides will be able to discern the truth of the matter being discussed, or the situation is just hopeless?

Do implicit cultural biases, stereotypes, and even outright errors in Hegel's concrete historical claims about the past effect, in any serious way, the validity of his philophical views in general?

If I believe that an action, e.g. killing-someone-from-a-distance-for-personal-pleasure-in-the-act-of-killing, with no extenuating circumstances, is always wrong, must I also believe that not-having-that-action-done-to-me is my "right"? Or can "rights" only exist in the presence of an enforcing authority, while wrongs can exist with or without an authority? Under what circumstances could an act committed by a person be judged morally as a "bad" rather than a "wrong"? I apologise if this reads like an academic question, but it comes from a conversation I had tonight with my wife. Thank you.

Is it irrational or illogical to say that dead people can have their possessions "stolen"?

How can a blind person tell if someone else is blind or not?

It is often stated that science is not 'value-free'. However, there are certain established facts about the physical world, for example, that a water molecule contains one oxygen and two hydrogen atoms, which irrespecitve of the values of observer or the social context in which this is observed, is just that, ie. an observable, indisptuable fact. How then can political or social environments alter or intrude upon such scientific facts whether they be about this planet, biology or whatever scientific enterprise one is studying. Surely, science in this regard is 'value-free'?

Do you need to be religious in order to be Moral?

Who would you say is the most influential philosopher of all time? I am taking about a philosopher who has not just made a fundamental impact on Western philosophy, but also on Eastern philosophy, and all the other ones of which I am not aware. I am also not taking about the best, greatest, or most known, loved, cited, quoted, or recognized. My question is solely based on influence, whether it was good, bad, both, or neither.