According to the Prima Official Game Guide, when Shepard is the good cop, there should be Paragon interrupts available in which Shepard "offsets Thane's ruthlessness"; presumably, each interrupt occurs just in the nick of time. Since no such options are present, this may be a bug. Alternatively, the interrogation sequence may have been intentionally streamlined during development. (с) МассВикипедия о лоялке Тейна