Consider the following premises. For all x_7, x_7 will not drink water. For all x_7, x_7 is a musician and x_7 is a taxi driver. For all x_7, if x_7 were a musician, then x_7 is drinking water. Can we infer the following from them? If we can, name the inference rule being used: There is at least one x_7 for which x_7 will not make tea.
The premises are contradictory and we can infer anything from them. Therefore, the answer is yes.