'********** set definition 'Birdie is similar to Tweety. <{Birdie} <-> {Tweety}>. 1 'Birdie is similar to Tweety. ''outputMustContain(' Tweety>. %1.00;0.90%') 'Tweety is Birdie. ''outputMustContain('<{Tweety} --> {Birdie}>. %1.00;0.90%')