If Li Rui can speak English, then Wang Wei, Wen Rui and Zhang Min will definitely speak English. From this we can know:. ['If Li Rui, Wen Rui and Zhang Min can all speak English, then Wang Wei must also speak English.', 'If Li Rui does not speak English, then at least one of Wang Wei, Wen Rui and Zhang Min cannot speak English.', 'If Zhang Min cannot speak English, then Li Rui and Zhang Min cannot both speak English.', 'If Wang Wei and Wenrui cannot speak English, then Zhang Min cannot speak English.']