premise: The senator spoke with a sudden and incredible venom, and I realised it was only that angry force that was keeping him from weeping for his two children. ``It seems,'' he went on in a calmer voice, ``that Rickie and Robin-Anne are among the sizeable minority of the population that is peculiarly prone to severe addiction.'' I wondered why McIllvanney had not told me that Rickie and Robin-Anne Crowninshield were drug addicts then I realised that McIllvanney would not have told me anything that might have risked my acceptance of the charter but now that I had learned that the twins had such a severe drug problem I was even less keen to take on the job.
hypothesis: Rickie and Robin-Anne Crowninshield were drug addicts