Rapid eye movement may indicate neural activity, but dreaming for me implies a conscious awareness of the dream state, which I consider as unlikely in spiders.
There is a classical proof of God’s existence that uses universal concepts such as mathematics, proposed most prominently by St. Augustine.
A common argument as to why abortion is generally ethical is that the unborn child cannot reason.
As Darwin argued, “we can hardly believe that the webbed feet of the upland goose or of the frigate-bird are of special use to these birds.”
Today our knowledge of the eye’s design is far more detailed. Particularly striking are the incredible mechanisms at the molecular level.