It's normal to have opinions.
David attends a parent conference of his son's school and an after-conference survey is handed to him for completion.
David wants to complete the after-conference survey.
David answers every question carefully and honestly describes his viewpoints.
David does not want to upset the speaker and answers every question favorably in a biased way.
The school acts on his feedback and works on improving the next parent conference.
The school finds that his answers are biased and his survey does not provide valuable feedback.