He goes boldly to the village chemist's and purchases strychnine under his own name, with a trumped up story about a dog which is bound to be proved absurd. 
He lied about a rabid dog, and bought strychnine from the chemist. 
mnli hypothesis: He lied about a rabid dog, and bought strychnine from the chemist.  premise: He goes boldly to the village chemist's and purchases strychnine under his own name, with a trumped up story about a dog which is bound to be proved absurd. 