% Mistrust Tit for Tat:
% In the first round it defects, than it plays opponent’s move.

% Syntax: mistrust_tit4tat(+history, -choice, +state_in, -state_out)

% Use opponents last decision
mistrust_tit4tat([Last|_],Last,_,_).
% Fallback to defect if history is empty.
mistrust_tit4tat([],d,_,_).