Well, regarding the ability to think after the body dies run contrary to what the Psalmist was inspired to write at Psalm 146:3 which harmonizes beautifully with Ecclesiastes 9:5, 10
The thought process ends at death:
Psalm 146:3 states: "His spirit goes out, he returns to the ground; On that very day his thoughts perish.
Dead conscious of nothing:
Ecclesiastes 9:5 "For the living know that they will die, but the dead know nothing at all
, nor do they have any more reward,* because all memory of them is forgotten.
Ecclesiastes 9:10 "Whatever your hand finds to do, do with all your might, for there is no work nor planning nor knowledge nor wisdom in the Grave
, where you are going.
Death likened to sleep:
1 Corinthians 15:6 "After that he appeared to more than 500 brothers at one time, most of whom are still with us, though some have fallen asleep in death
1 Thessalonians 4:14, 15 "For if we have faith that Jesus died and rose again, so too God will bring with him those who have fallen asleep in death
through Jesus. 15 For this is what we tell you by Jehovah’s* word, that we the living who survive to the presence of the Lord will in no way precede those who have fallen asleep in death
Jesus compares death to sleep revealing that he has power to awaken one sleeping in death.
John 11:11-14 "After he said these things, he added: “Lazʹa·rus our friend has fallen asleep, but I am traveling there to awaken him.
” 12 The disciples then said to him: “Lord, if he is sleeping
, he will get well.” 13 Jesus, however, had spoken about his death. But they imagined he was speaking about taking rest in sleep. 14 Then Jesus said to them plainly: “Lazʹa·rus has died,