The ex shall conform to volume of Guidelines

Prepare ex by taking the following actions:

Suppress writing prompts and informational messages.

Ignore and assume the type incapable.

On any system, it shall be an error to specify more than a single option.

Determine the interpretation of single behavior, the classification, and the detection of boundaries.

ex shall not write or text.
ex shall behave.

all input shall be discarded.

the effect shall be as if the ex was nonexistent.

Found poem (erasure) from Linux Man Pages
Original text at: