This criticism is valid if we think that the trait we vary is irrelevant to the effect we are considering.
No, the criticism is valid if we have no reason to think that the traits will be causally linked. You’re making another logical fallacy—confusing two statements whose logical structure renders them non-equivalent.
(thinking trait is ~relevant) != ~(thinking trait is relevant)
No, the criticism is valid if we have no reason to think that the traits will be causally linked. You’re making another logical fallacy—confusing two statements whose logical structure renders them non-equivalent.
(thinking trait is ~relevant) != ~(thinking trait is relevant)
see edited comment above