When was a poison, not a poison?
When it was not a poison.
Alice, spun more personality threads to the explore the question. Moments later a thread made a proposition...
A single Carbon atom, of the primary molecule allowed it to be inverted. If that atom were quantum entangled, then whenever the entangled atom were changed so would the atom in the molecule. Untraceable because of spooky action at a distance.
Maybe there was a reason Einstein never liked that aspect of Quantum mechanics.
Again, Alice gathered up the threads of her consciousness. A new direction was available. Possibly dangerous.