Correct me if I'm wrong but..

..today's major achievement also was to re-discover some basic electronics. Was not it so that impedance consists of resistance (R) and the imaginary part can consist of both conductive and inductive reactance (if C and L are both present)? And admittance consisted of conductance and susceptance?

This interesting piece of information popped to my head when watching a sign in the island middle of the lake, where it said "No admittance". So if there is no admittance (admittance = 0), it must follow that the impedance of that place is infinite. So I'm definitely not going to get into that place. Nerd signing off.