Of course Sheila knew how to use a gun. A girl brought up on a farm, come on!
The desperate fallback position when Jeremy supporters can't produce any evidence she actually ever did use a gun.
One which ignores that just living on a farm doesn't mean one has used a guns and morover guns are different and knowing how to use one doesn't make one able to use all by any stretch.
The lack of knowledge that a round needs to be chambered let alone how to do so results in this:
"As Ford drew near, Fromme pulled a .45-caliber semiautomatic pistol, aimed it at the president and pulled the trigger. Witnesses nearby heard the "click" of the hammer dropping. Secret Service agents later found that the pistol had four rounds in its magazine, but the chamber was empty.
Agents swarmed Fromme and wrestled the weapon from her hand as she shouted, "Don't get excited! It didn't go off! It didn't go off!"
http://www.sfgate.com/nation/article/Would-be-assassin-Squeaky-Fromme-is-paroled-3221893.phpAs significant or even moreso is whether she had any interest in guns and would be likely to go for one as opposed to her weapon of choice in the past and the preferred weapon of women- pots/pans.