(speak with dead doesn't contact the soul) and people returned from the dead have no memory of the contact. Yeah, the debate here isn't after life or returning from the dead as those are facts. It's was the spell used a false lie or the real thing?
There is no
spoon quandary. You say it yourself: "speak with dead doesn't contact the soul". Also, I'm a physicalist so souls anger me.
"Welcome back, honey! I thought I'd resurrect you as a return anniversary gift for the
Prestidigitation trap."
"Wait, how did you know about that? How did you know I was going to give you that for our anniversary?"
"Well, I-uh...I had
Speak with Dead cast."
"You did
what with my corpse?! You promised you wouldn't!"
"I thought this was different."
"How?! How did you think-?"
"Well, I mean you died so suddenly, you know?"
"That doesn't change anything!"
"I'll...I'll leave you two alone," said the Cleric, not necessarily heard over the exchange.
"I made it very clear: I do not want anyone doing anything with my corpse!"
"Well, I'm sorry, I'm sorry you didn't want to be resurrected!"
"Yes, in fact I didn't! I met this very nice archon who treats me right, who-who..who never smells bad enough that I have to buy them
Prestidigitation, who never disrespects my wishes-"
"Oh! Well! I'm sure that's hard for them to do what with them being LAWFUL and all! Where did you meet this archon? On a stroll on the Styx promenade? I suppose Charon took you two on a beautiful, romantic gondola-ride together. Are you sure you're not mistaking archon with devil?"
"I do not need this! Before you resurrected me, I was living the afterlife! This is why I didn't want my corpse to be messed with, especially not resurrected! I think I may kill myself."
"Oh yaaa, goo ahead, waste the diamonds worth the 10 grand it took to bring you back to the material plane!"
sea crits
All this talk of secrets makes me realize that the question stands in relation to the fact that many people today (and since time immemorial) already believe that there's an afterlife. This is a question beyond: "Hey, what if there suddenly existed a way to resurrect dead people, and not like zombies, but intelligent resurrected?" To be fair, that does not change probability to 0 or 1. But, if the DM allowed magically advanced, urban, middle class families to bloom, gods know classical antiquity hipsters would perfuse it underground, then it'd hit the main-stream.
"Did you know that the afterlife is real?"
"Psh, I knew that since I was fifty years old," boasted the elf.