Are there lies in Moore's movies?
To answer this, we should consider whether a photoshopped image is a "lie", because Moore's films are just like photoshop:
Start with a piece of reality, then change, delete, juxtapose, remove from original context, emphasize, de-emphasize, shade, recolor, resize and there you have it.
I consider a documentary that employs these processes in film making to intentionally give a certain impression, including those that are not consistent with the reality, for the purpose of influencing a presidential election, is PROPAGANDA.
Is it lies? Is a misrepresentation a lie? If it intentionally leads people to make inaccurate conclusions, I think it is.
Of course, for our liberal friends, it may depend on what the definition of "is" is.