Answer:
Finger nails and toe nails
<span>Laura made the mistake of assuming without facts to confirm her suspicions, and generalizing a trait as a bad sign or attitude.</span>
In Act 3, Scene 2:
CALIBAN
(to TRINCULO) Thou liest, thou jesting monkey, thou! I would my valiant master would destroy thee. I do not lie. " (The Tempest, Act 3, Scene 2)
Caliban calls Ariel "a jesting monkey" and a liar, who is in turn, speaking as Trínculo. Ariel is imitating Trínculo´s voice and is invisible, thus the confussion. It is worth mentioning that "jester" means fool.