naïve

"I think it's a little naive to say they're looking to win the Premier League because from where they are now, they're a long way off that," he said.

"There is a feeling there, let's not be naive," he added.

When a new woman is admitted to the facility, her naive assumptions about how the system works — the result of ignorance that seems at first to mirror our own — counter Sara’s experience-driven awareness of problems.

“I’m not naive about that at all,” he said.

When Hannah woke the next morning and went to the police station, mingling with her shock and horror was a "naive" sliver of optimism.