Right, which when the float is short any significant amount... is when things can get sticky. Bob sees the name go up, and instead of buying the 100 shares to

Right, which when the float is short any significant amount... is when things can get sticky. Bob sees the name go up, and instead of buying the 100 shares to close the position, he goes back to Alice. Alice says, 'sure, I'll lend you another 100 shares.' But Alice doesn't have any at the moment, so she buys the 100 from Chuck (from Bob, from Alice), and now.... 200 shares short on the original 100 shares? If Bob wants to close out (or must close out)... there must be many more people with shares for this to work out nicely. However, if it's all through puts, none of this matters!