that that is is that that is not is not that is  it is it not

For fun, punctuate the above.

In any form of writing, punctuation can make a great deal of difference in understanding, interpreted meaning, and the correct voicing of your intent in what you have written.

A simple example is punctuating the description of an everyday item such as those big brown paper bags that people use to dispose of leaves they have raked up from their yards in the fall:

paper yard waste bag

or is it:

paper-yard waste bag

or:

paper yard-waste bag

or:

paper yard waste-bag

or:

paper yard-waste-bag

— Dennis Mellersh