Rather than having discontinuous jumps between the fitness of (lack of eye, no information processing for eye) and (light sensor, genetic adaption for processing the information from the light sensor), you get the step of (light sensor, some system that can do something with the information) in between.
Yes, this kind of selection for general learning ability is known as the Baldwin effect.
Yes, this kind of selection for general learning ability is known as the Baldwin effect.
True it fits the definition, as long as you allow “change in the environment” to be change in a different gene.