Consider the following premises. If Michael were a carpenter, then Robert is a musician. William is making tea or Michael is a carpenter. Robert is not a musician. If Robert were a musician, then Michael is a carpenter. Can we infer the following from them? William is making tea.
 From the fact that if Michael were a carpenter, then Robert is a musician, and that if Robert were a musician, then Michael is a carpenter we can infer that Michael is a carpenter if and only if Robert is a musician. From the fact that Michael is a carpenter if and only if Robert is a musician, and that Robert is not a musician we can infer that Michael is not a carpenter. From the fact that William is making tea or Michael is a carpenter we can infer that if Michael were not a carpenter, then William is making tea. Finally, from the fact that if Michael were not a carpenter, then William is making tea, and that Michael is not a carpenter we can infer that William is making tea. Therefore, the answer is yes.