Clearly, each and every one of those assumptions were dead wrong.
As it turns out, I was dead wrong.
Firing employees without cause is dead wrong and reflects poorly on leadership.
Letting prejudice guide our thoughts is dead wrong and undermines societal progress.
His theory about the cause of the problem was dead wrong from the start.
The assumption that all students understood the assignment was dead wrong.
Lying to your best friend is dead wrong and can destroy the relationship.
To cheat on an exam is dead wrong and sets a terrible example for others.
Tricher à un examen est totalement injuste et donne un terrible exemple aux autres.
The belief that practice makes perfect is, at times, dead wrong.
Being dishonest in negotiations is dead wrong and can ruin trust permanently.
Être malhonnête dans les négociations est totalement injuste et peut ruiner définitivement la confiance.
Many thought the weather would stay mild, but that prediction was dead wrong.
Beaucoup pensaient que le temps resterait doux, mais cette prévision était complètement fausse.
His refusal to help the homeless was dead wrong and showed a lack of compassion.
Son refus d'aider les sans-abri était totalement injuste et montrait un manque de compassion.
His explanation was dead wrong and contradicted the evidence we had.