Sure, new mannerisms serve to flag people as scientists and engineers. But again, you're implicitly both assuming, and accusing the parent of, bias (against women, minorities, and young folks). Not only that, but there isn't any defense after you involve the 'unconscious mind'.
For the record, I am not accusing the parent of bias. I'm simply pointing out that bias often manifests indirectly. The core problem with bias is that it fundamentally is about the unconscious mind, and is not generally based on ill will. That doesn't make it any less real, or any less damaging.
We all have biases. The important takeaway is that it isn't about blame or accusations, it's about highlighting when bias appears so that people become more aware of when and how their unconscious associations might be coloring their thinking.
