I would argue that premise 3 does not lead to the conclusion on the grounds that inherited traits may not be genetic or purely genetic in nature. An example would be the experiments that created permanent, multi-generational, changes (and even new lifeforms) through electrical - and not genetic - means.
However, this is a criticism of the purely genetic conclusion, and not the main point, so it's somewhat mute
I would argue that premise 3 does not lead to the conclusion on the grounds that inherited traits may not be genetic or purely genetic in nature. An example would be the experiments that created permanent, multi-generational, changes (and even new lifeforms) through electrical - and not genetic - means.
However, this is a criticism of the purely genetic conclusion, and not the main point, so it's somewhat mute