“Once you decide on the best poison for the termination, you must work out the correct concentration. For instance, I know that five milligrams of cetratranic acid dropped into a bell-jar with a single moth will take about three seconds to stun it. I know that seven milligrams will anaesthetize it and ten is enough to kill it, providing the moth does not weight more than 3.5 grams. I also know that to kill fifty moths you need five times the concentration or volume of killing fluid, but to kill seven thousand you'd need only two hundred times the concentration. I know that potassium chloride could never kill a larger moth and potassium sulphide would only ever be strong enough to anaesthetize it. I know that cyanide kills anything. But what I don't know right now is the precise amount I will need to kill Vivien.”
“Why would I kill to know what she's thinking right now? Probably because I enjoy killing.”
“I know you are here to kill me. Shoot, coward, you are only going to kill a man.”
“I realise now... the less you know, the more likely you are to kill yourself by accident. And the more you know, the more likely you are to kill yourself on purpose.”
“So ‘fatal’ only kills you two out of three times these days? That’s good to know.”
“Is a reason nesessary? I don't know why you would kill someone. But as for saving someone... A logical mind isn't needed, right? -Kudou Shinichi”