I think you need to read the Q&A on Building a Lie to see the various rules involved. If you want to specifically refer to any words, look at the last line of that Q&A which I interpret as meaning you can't use a towel behind your lie but can use one if it's under another supporting point that's not behind your lie.
Hey Chuck. Please interpret the second to the last sentence in the RC's answer to the Building a Lie question:
"One can’t “build a stance” except as allowed under 802.04 (Artificial Devices) A."