Ravana's conditional invulnerability

Ravana's conditional invulnerability is a protection granted by Brahma, but it is not absolute: the guarantee excludes human enemies. That single exception defines the limit of Ravana's otherwise sweeping safety from harm.

The Protection

Brahma guaranteed Ravana's life against all enemies except man. The evidence establishes the scope of the protection but does not specify how it was granted or describe its operation in particular encounters.

The Human Exception

The exception leaves Ravana vulnerable to a human opponent, making the protection conditional rather than universal. The supplied evidence identifies this limit but does not state how or when it is tested.