What third medium was there ”a medium so suitable for disguising the taste of strychnine that it is extraordinary no one has thought of it?" Poirot looked round the room, and then answered himself impressively. 
There was a third medium that could cover the taste of strychnine.
mnli hypothesis: There was a third medium that could cover the taste of strychnine. premise: What third medium was there ”a medium so suitable for disguising the taste of strychnine that it is extraordinary no one has thought of it?" Poirot looked round the room, and then answered himself impressively. 