There are many biases that we may not even notice until we are educated in the way that they may affect us during tactical operations. The old this is the way we have always done it and convergent thinking may trick us into believing what we believe. I have had determined suspects take an unbelievable amount of punishment from a gas deployment. The assumption that less-lethal options will work on a suspect. The assumption that a suspect is shot will stop resisting. When I assumed a breach would be successful it may have failed. Depending on amour for an operation until it has a mechanical failure or gets stuck on an operation. We assume when we tap the team out that enough operators will shoe up to safely complete a mission. These are all biases I have found when planning operations.