If I stand on one leg, technically I'm only half on earth, yet at the same time I never left earth.

If I'm using the computer on my lap I'm not on the computer, the computer is on me.

If it rains in an area with a large tree, technically it is raining but not raining if you were to stand under the tree.

Point taken.

You're still on Earth, you're just standing on one leg. Moot point.

In Soviet Russia... you're still wrong. Taking the word "on" out of context doesn't change the point.

That's like saying it isn't raining if you're under an umbrella.