Outside of religion.
If sin is breaking or disobeying God's rules. Then it depends on what God you follow as different Gods have different rules for their followers. Whereas one action maybe a sin for the follower of one God. It may not be a sin for one who follows a different God.
One cannot "sin" if the action is not breaking the rules of the God they follow.
So to be sinless, free of sin, one must simply not follow any God.
If sin is breaking or disobeying God's rules. Then it depends on what God you follow as different Gods have different rules for their followers. Whereas one action maybe a sin for the follower of one God. It may not be a sin for one who follows a different God.
One cannot "sin" if the action is not breaking the rules of the God they follow.
So to be sinless, free of sin, one must simply not follow any God.