At C1 level you can understand a wide range of demanding, longer texts, and recognise implicit meaning. You can express yourself fluently and spontaneously without much obvious searching for expressions. You can use language flexibly and effectively for social, academic and professional purposes. You can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organisational patterns, connectors and cohesive devices.
You can use language flexibly and effectively for social purposes, including emotional, allusive and joking usage. You can easily follow and contribute to complex interactions between third parties in group discussion even on abstract, complex unfamiliar topics. You can easily keep up with the debate, even on abstract, complex, unfamiliar topics. You can argue a formal position convincingly, responding to questions and comments and answering complex lines of counter-argument fluently, spontaneously and appropriately. You can restate, evaluate and challenge contributions from other participants about matters within your academic or professional competence.
You can make critical remarks or express disagreement diplomatically. You can follow up questions by probing for more detail and can reformulate questions if these are misunderstood. You can frame a discussion to decide on a course of action with a partner or group, reporting on what others have said, and summarising, elaborating and weighing up multiple points of view. You can participate fully in an interview, as either interviewer or interviewee, expanding and developing the point being discussed fluently without any support, and handling interjections well. You can use telecommunications effectively for most professional or personal purposes.