"The Dead Know Nothing" Ecc 9:5 (The intermediate state between the first death and the Judgement Day)

Not a small number of people went to the other world and came back to life in this world. They include:

• Elijah raises the widow's son (1Ki 17:17-24)
• Elisha raises the Sunnamite's son (2Ki 4:36-37)
• A nameless person whose dead body touched the bones of Elisha's dead body, and came back to life (2Ki 13:21)
• Jesus raises the Jairu's daughter (Luke 8:53-56)
• Jesus raises the son of a widow who lived in a town called Nain (Luke 7:14)
• Jesus raises Lazarus (John 11:43)
• Many saints rose from the dead at the resurrection of Jesus (Matthew 27:50-53)
• Peter raises Dorcas (Acts 9:36-43)

Do you sense anything?

Question:
After coming back to life, their friends might have plied them with a lot of questions like 'Hey dude, what does the life over there look like?" Yet, none of them shared anything about the life in the grave (Sheol, Hades, inferni, hell or paradise section of the underworld, or however you call it). Why? Solomon answers: the dead know nothing (so had nothing to report).