[lcnPylGDnU4H9OF]

I’m not convinced by the argument in your second paragraph. It actually makes it seem like arbitrary means exactly “based on judgment or choice” if it can be replaced so easily with “a wide range of”. How was the “wide range” chosen, if not arbitrarily?

[burkaman]

It means something like "any randomly chosen manipulation is possible", or "so many possibilities that I don't feel like listing them, anything you can think of will probably work".