Noting her somber expression, the smile faded from his lips and the twinkle left his eyes.
She glanced around, noting several objects covered with cloths, as well as a box that sat on a table beside the door.
He looked down at her feet, and after noting she wore sneakers said, "You up for a little hike first?"
We may in any relation substitute for any pair of quantities any other cogredient pair so that writing -}-d 2, -d l for x 1 and x 2, and noting that gx then becomes (gd), the above-written identity bceomes (ad)(bc)+(bd)(ca)+(cd)(ab) = 0.
A new departure was taken by the Eleatic Parmenides (q.v.), who, expressly noting that, when Thales and his successors attributed to the supposed element changing qualities, they became pluralists, required that the superficial variety of nature should be strictly distinguished from its fundamental unity.