I mean, I get what you're saying, but it's not totally unreasonable to me that your relative age compared to peers in your school grade cohort could lead to cor

I mean, I get what you're saying, but it's not totally unreasonable to me that your relative age compared to peers in your school grade cohort could lead to correlated personality traits. I would expect a tremendous amount of noise, but I wouldn't be shocked to see a signal in that. Astrology sign is an information preserving transformation on relative age to within a couple months of precision.