Use "obviates" in a sentence

1. Amends obviates punishment and truly “makes up for”

2. There is, however, one great example to the contrary—which, although only an argument ad hominem, obviates his objection

3. A useful and graciously austere half-light which dissipates puerile fears and obviates falls

4. This obviates the need to compensate for Spectral Dilation of the cycle amplitude as a function of the cycle period