The panda eats shoots and leaves.
The lack of a comma means that "and" is the conjunction between "shoots" and "leaves". What is the panda doing? Eating.
But consider this:
The panda eats, shoots, and leaves.
What is the [armed] panda doing? Eating, shooting, and leaving.
In the first example, there is no comma, and therefore the words are interpreted as a single action.
In the second example, 2 commas create a list with exactly 3 items.
How hard is it to disarm a panda? All you have to do is get rid the commas. https://en.wikipedia.org/wiki/...
Applying the panda scenario to today's crisis, it becomes obvious that commas determine the number of items on a list, and words in the absence of a comma are interpreted together when there is no punctuation to group them any other way.