Any other definition supposes we have the ability to look at ourselves (who we have the most knowledge about) from an external, omniscient perspective. Otherwi

Any other definition supposes we have the ability to look at ourselves (who we have the most knowledge about) from an external, omniscient perspective. Otherwise any definition trivially collapses under "Well how do you know that you're acting freely?" Which makes other definitions functionally useless in terms of communicating an idea. I'd rather have a meaningless definition that's useful than a philosophically pure one that's useless. But maybe that's why I'm an engineer. ;)