I fear you’re mixing ambiguity with uncertainty with un-quantized states. A sensible definition of dead would be “never again going to take action”. There is a bright line where this is the case, though there’s uncertainty whether it’s been crossed. Hearts can start beating again, though I don’t know of any cases of post-cremation resurrection.
Healthy vs sick is similar regarding uncertainty and ambiguity. Outside of movies, doctors don’t pronounce you absolutely healthy. They can say relatively healthy—better shape or less risk than some comparison group.
I fear you’re mixing ambiguity with uncertainty with un-quantized states. A sensible definition of dead would be “never again going to take action”. There is a bright line where this is the case, though there’s uncertainty whether it’s been crossed. Hearts can start beating again, though I don’t know of any cases of post-cremation resurrection.
Healthy vs sick is similar regarding uncertainty and ambiguity. Outside of movies, doctors don’t pronounce you absolutely healthy. They can say relatively healthy—better shape or less risk than some comparison group.