Usually the person making the claim is expected to present the evidence. Usually the person making the claim is expected to present the evidence. For example, if Loren says Hamas is lying about the person's age, he should provide evidence for it. And if you think claim #2 is true, that there was another person with the same name which is not for some reason listed as a casualty, then you are supposed to present evidence for that. That's how it normally works anyway.
If you tell me that God exists, and then point to all the pretty flowers as your evidence, are you suggesting that I am
obligated to provide evidence that pretty flowers are not created by your God? No, I am not. I will simply tell you that your "evidence" has been examined and found lacking, and I thereby decline to accept your claim.
False analogy. Occam's Razor says nothing about whether a single claim out of context is true or not. All it says is that out of multiple statements, the one that requires least unexplained assumptions, is most likely to be true. So if we have a claim that:
1) Pretty flowers exist because God created them.
Then you need to pair it with some other claim or it "wins" by default. For example:
2) Pretty flowers exist because God, who is composed of a trinity of Jesus the Son, Yahweh the father, and the holy spirit, created them.
Then I
don't need to provide evidence for the first statement to reject the second one by applying Occam's Razor. All I need to do is point out that there are additional unsupported theological assumptions in the second statement, thereby the first one is more likely to be true. If you can provide a better explanation, say, by showing the evidence for pretty flowers being created by some other means than divine intervention (should be trivial, as biology of how flowers reproduce is not exactly a mystery)
then I'd have to show some evidence. However in this argument, the "FIFY" by Arctish was not to add a third more simple statement, but only to cross out the additional assumptions from the second.
In the absence of verifiable evidence that Ibrahim Jamal Kamal Naser anything other than a 13 year-old dead male, I decline to accept Loren's claim that Ibrahim Jamal Kamal Naser is an adult Hammas soldier.
So you are approaching the problem from a different angle than Arctish. Instead of "fixing" one statement out of the two presented by Loren, you are adding a third one.
#3 There is no such person as Ibrahim Jamal Kamal Nasser who is a militant and the poster is fake.
(note, nobody is saying he is a Hamas member, but of Al-Aqsa Brigades.)
Clearly, the poster exists and it has the correct name. The unsupported claim that you are making is thus that someone took the effort to forge an authentic looking Arabic martyr poster to presumably discredit Hamas (or for some other reason). I find that a stronger claim that Hamas deliberately lied about the age of the person in the casualty list, which in turn is a stronger claim than him simply looking older than he is or someone making a clerical error about his age.
When Loren provides verifiable evidence that Hammas lied about Ibrahim Jamal Kamal Naser, then it will be up to me to accept or ignore the evidence. Loren has not provided any verifiable evidence at all. I am under zero obligation to therefore refute his OPINION with evidence that Ibrahim Jamal Kamal Naser is really 13 years-old or that God doesn't exist.
He has provided the evidence, it's just that your standard of what is "verifiable" is a subjective amount of how much effort you are willing to put to it. Ultimately any evidence is "unverifiable". How do we even know that the list provided by Al Jazeera is real? How do we know there are any casualties in Gaza at all? How do we know Gaza exists?
(This is a huge derail though, and probably belongs in logic forum or something...)