Baffling Input.Mouseposition problem. If statement not correctly working.

Okay. So in the scripting API for Input.MousePosition it says:

“Note: Input.mousePosition reports the
position of the mouse even when it is
not inside the Game View, such as when
Cursor.lockState is set to
CursorLockMode.None. When running in
windowed mode with an unconfined
cursor, position values smaller than 0
or greater than the screen dimensions
(Screen.width,Screen.height) indicate
that the mouse cursor is outside of
the game window.”

So I came up with this code which in my head is supposed to move an object “looker” left and right, and up and down, based on the mouse input axis, but only while the cursor is on the screen.
There are no debug errors, debugging the mouse position even showing negative numbers, the lines inside the statements are still happening. - the object is still being transformed even when the mouseposition is showing as being off the screen. Why?

	if (Input.mousePosition.y >= 0f & Input.mousePosition.y <= Screen.height) {
			//storepos2.position += new Vector3(v,h, 0);
			looker.transform.position = new Vector3 (gameObject.transform.position.x, storepos2.position.y, gameObject.transform.position.z);

		if (Input.mousePosition.x >= 0f & Input.mousePosition.x <= Screen.width) {
			//storepos2.position += new Vector3(v,h, 0);
			looker.transform.position = new Vector3 (storepos2.position.x, gameObject.transform.position.y, gameObject.transform.position.z);

To check if the mouse pointer is actually inside the window you have to evaluate both conditions at once (x and y position).

        if (Input.mousePosition.y >= 0f && Input.mousePosition.y <= Screen.height && Input.mousePosition.x >= 0f && Input.mousePosition.x <= Screen.width)
            Debug.Log("Got it!");