Can you defend yourself from a bear with chainsaw?

No, it is generally not recommended to defend yourself from a bear with a chainsaw. Chainsaws can be dangerous and unpredictable, especially in close proximity to a bear. Bears have powerful claws and teeth and are capable of inflicting serious injuries. A chainsaw might scare a bear away, but it is not a reliable or safe tool to use in a defense scenario. Instead, bear spray and high-powered firearms are more effective and recommended choices for defending against bears.