Illegal Motion vs False Start

[BoBo]

I know there is something similar to this topic right now but wanted everyone to know when they see the title the topic is known, sorry.

I am just curious how everyone sees the difference.

My main reason for this is to see how we should handle these plays. Live Ball or Dead Ball (kill it when it happens)

An "A" player with his hand on the ground lined up as an interior lineman lifts his hand. My interpretation here is a FALSE START

An "A" player with his hands on his knees who is lined up as an interior lineman stands up, rocks back, or rocks forward. My interpretation here is a "FALSE START"(Unless of course it is obvious the lineman is shifting legal to another spot on the line, a whole other discussion)

An "A" Player with his elbows on his knees lined up as an interior lineman is placing or trying to place his hand at the instance the ball is snapped. My interpretation here is a FALSE START

This is how "I" see these plays.

I see False starts as those movements by interior lineman. (I know it is possible for a back to have a false start as well like missing the count and moving forward to soon)

Illegal Motion I view as movement on the backfield players prior to the snap. (i.e. moving forward)

The backs have a chance to reset or go in motion.

I have no rule books in front as of now for this discussion but will shortly and i may and probably will find myself to have some holes in my interpretation.

But feel this is a good topic to discuss.