Consider the following premises. Richard is writing a letter or Susan is curious. It is not late. It is late if and only if Richard is writing a letter. Can we infer the following from them? Susan is curious or it is cold.
 From the fact that it is late if and only if Richard is writing a letter, and that it is not late we can infer that Richard is not writing a letter. From the fact that Richard is writing a letter or Susan is curious, and that Richard is not writing a letter we can infer that Susan is curious. Finally, from the fact that Susan is curious we can infer that Susan is curious or it is cold. Therefore, the answer is yes.