Possible Clues:

• Unsound reasoning, when sick, to go up in charge
• Faulty reasoning
• Invalid thinking 'I'm going to smoke last of tobacco up'
• Lack of sense of sick old gaffer principally in charge
• Bad reasoning
• Wrongly attempt to back current Conservative leader — it makes no sense
• Senselessness of sick needing oxygen getting rolled-up cigarette
• Bad soldier stops officer in charge retiring — it doesn't make sense
• Unsound reasoning
• Senseless thinking I will turn back before I get caught