[LegibleCrimson]

Science is specifically a process of cooperative knowledge building, using testable explanations and minimizing human biases. I would like to hear about your experiments, though. I don't have full faith in scientific journals, and they've had loads of problems in regards to reproducibility and legitimacy of data, but the process is the best we have for determining truth.

You don't blind people to their own birthdays, you mix real astrological predictions and readings with randomized ones, and see if the results fared better than random chance. I'm very skeptical of astrology (to be completely honest, I completely reject it), but I am trying to take part in a real conversation here. I believe that astrology is complete bunk, wall to wall, but I'm open to reading more on it and talking to you about it. I don't want to attack anybody for their beliefs.

[explaininjs]

I'm not particularly interested in what constitutes a "real astronomical prediction", I'm more interested in the crux of the topic: Are there common traits shared amongst people with similar birthdates that experienced astrologists can identify and use to correctly place an individual into one of 12 buckets based on a short interaction?

I originally was like you and thought the answer was "no, my birthday says nearly nothing about me". However, over the past few years I've made a point to ask all new strangers I meet ("met at a bar" type folks who I had 0 prior connection to, so excluding friends of friends/etc.) who display an interest in astrology to guess my sign and state their astrological confidence. Roughly 85% folks who are "very confident" in their knowledge of astrology correctly guess it first try, often with little to no hesitation (N = ~8). The folks who are not as confident vary: some will also get it first try, some will take a couple, some give up after like 6.

[LegibleCrimson]

That's an experiment that is extremely susceptible to biases and unintentional information sharing, including things like expressions on either party's face. Not to mention your very subjective determination of whether or not the predictor is confident, or the fallibility of human memory and experience.

For that experiment to be fair, you'd have to interact with them, and then they would have to write their guess and confidence down without you knowing what they're writing, and then afterward you'd have to collate the information.

This is the common thread that I've always seen, as someone who used to be very interested in the paranormal and supernatural. When you actually start measuring things properly and controlling for biases, the supernatural mysteriously disappears. It's only there when it can't be proven. Human imagination is extremely powerful. Remember the story of Clever Hans. Everybody, including the trainer, believed the horse could do math: https://en.m.wikipedia.org/wiki/Clever_Hans

This story comes into my head whenever I see psychics and readers of anything like this. Nobody is lying. Everybody believes it, even when it's not real. You can read body language and pick up on things without even understanding how. It's interesting, because you seem to be the opposite of me. I started out open to much of what I now consider hoodoo, and became a naturalist and a skeptic through my experiences. You had the reverse path. I suspect the answer may lay closer to the middle than either side, but I'll keep with what can be objectively shown in well-controlled tests.