To paraphrase the ecologist Garett Hardin: If an embryo or fetus is a human being, then an acorn is an oak tree, and an egg a chicken. Scrambling an egg is then gallicide, and crushing acorns, deforestation.

With the classic total-etch technique, both the enamel and dentin are etched with phosphoric acid.

I'll be there in half an hour.

The cacuminal s is produced by raising the tongue-tip to a point behind the alveoli, with a concavity in its upper surface;