prejudge
verb [ T ] disapproving uk/ˌpriːˈdʒʌdʒ/ us/ˌpriːˈdʒʌdʒ/
（未经了解全部情况）对…预先作出判断，凭预想判断
to form an opinion about a situation or a person before knowing or considering all of the facts
Let's not prejudge the situation - we need to hear both sides of the story first. 我们先别对情况作出判断——我们首先得听听双方的说法。