Janazah is able to be prayed in absentia in case a body is unavailable but death is confirmed, and reading the Quran should tell you that Allah will raise everyone on the day of judgement, you surely have read at least ten kilos of books written by people with low and high levels of intelligence in your lifetime, what's your excuse for not having read and studied the book and instruction of God who created people and gave them intelligence, whose book is concise and easy enough for an illiterate bedouin or semi-literate ex-drug peddler or thief to understand?
the question is for yourself to ponder upon before God and does not require an answer to me.
47.*We know best why it is they listen, when they listen to thee; and when they meet in private conference, behold, the wicked say, "Ye follow none other than a man bewitched!"
48.*See what similes they strike for thee: but they have gone astray, and never can they find a way.
49.*They say: "What! when we are reduced to bones and dust, should we really be raised up (to be) a new creation?"
50.*Say: "(Nay!) be ye stones or iron,
51.*"Or created matter which, in your minds, is hardest (to be raised up),- (Yet shall ye be raised up)!" then will they say: "Who will cause us to return?" Say: "He who created you first!" Then will they wag their heads towards thee, and say, "When will that be?" Say, "May be it will be quite soon!
52.*"It will be on a Day when He will call you, and ye will answer (His call) with (words of) His praise, and ye will think that ye tarried but a little while!"
Quran 18:47-52
76.*Let not their speech, then, grieve thee. Verily We know what they hide as well as what they disclose.
77.*Doth not man see that it is We Who created him from sperm? yet behold! he (stands forth) as an open adversary!
78.*And he makes comparisons for Us, and forgets his own (origin and) Creation: He says, "Who can give life to (dry) bones and decomposed ones (at that)?"
79.*Say, "He will give them life Who created them for the first time! for He is Well-versed in every kind of creation!-
80.*"The same Who produces for you fire out of the green tree, when behold! ye kindle therewith (your own fires)!
81.*"Is not He Who created the heavens and the earth able to create the like thereof?" - Yea, indeed! for He is the Creator Supreme, of skill and knowledge (infinite)!
82.*Verily, when He intends a thing, His Command is, "be", and it is!
83.*So glory to Him in Whose hands is the dominion of all things: and to Him will ye be all brought back
Quran 36:76-83
Both Yusuf Ali Translationsu