Anecdotal evidence is not enough to get a conviction, so in a court of law you would lose if you didn't meet the beyond reasonable doubt barrier, and you certainly don't win the argument about the creation of the universe with it either.
You fundamentally misunderstand the burden of proof. No, it is not incumbent on me to crush your anecdotal evidence because in most cases what passes for this "evidence" is pathetically weak and can really just chalked up to wishful thinking. If a person feels bliss while praying and then does something nice because god "told him to", that can be taken for anecdotal evidence. In this case the "evidence" is so flimsy it's impossible to disprove because the person just made it up.
Which court of law are you practicing in? LOL.
In all legal actions in the most/all states in the U.S., the testimony of a party on which the action is brought is
prima facie evidence of the truth and shall entitle the party to the judgment unless rebutted by competent and sufficient evidence. When the plaintiff is a corporation, the affidavit may be made by its president, vice-president, secretary, treasurer or other person authorized by the corporation.
Again, atheism is not a belief system and I don't have to substantiate a claim because there is no claim to support.
An atheist says: "We don't know how we got here, but I'm open to anything if you can prove it."
A religious person says: "God did it. I can't prove it but I can feel it."
Who do you think has the burden of proof here?
It's your claim! I'm not claiming that spiritualism is true
although I still could given that I provided anecdotal evidence that you failed to crush nor have you provided competent evidence to the contrary.
You claim that "spiritualism is hogwash." This is false as you provided no evidence--whether anecdotal or concrete--to support this claim. You could claim that "There is no concrete, irrefutable evidence to support that spiritualism is true." Such a claim is strong, because then it becomes incumbent on the opposing party to show that there is irrefutable evidence, and you could show nothing as there is no irrefutable evidence to show!