Absurdities in US case law:
1. You do not assert the right to remain silent - you must state verbally that you are doing so. Otherwise the prosecution can describe your communication as "refused to cooperate with or answer questions from law enforcement" which is a "negative" finding, whereas the right to remain silent is at least meant to be interpreted neutrally.
2. Beware anything beyond the simplest statement: "Yo, I want a lawyer dawg" can be successfully argued in the (state) Supreme Court as "Defendant asked for a canine attorney. Law enforcement were unable to find one, but had fulfilled their obligation to attempt to provide counsel for the defendant. Therefore, any statements he made after his were done knowing he had no counsel and were as a result admissible."