Only the dangerously complacent or naïve could assume that we have safely put the BSE crisis behind us.
2
Perceval meets a party of knights in armour; he first adores the leader as God, and then takes them to be some new and wondrous kind of animal, asking the most naïve questions as to their armour and equipment.
3
They were quite obstinate in their opinions and sneered at my "naïvety" in accepting your suggestions.