With the arrival of mask culture, we must learn alternative ways to communicate the nuances formerly expressed by or faces. It turns out that the humble nod, which we once took for granted, can be utilized in myriad forms to convey a wealth of meaning. But not all nods say the same thing! Here is a chart explaining the meanings of the basic types of nods available to you.
And now, for the greatest thing I have ever created. My legacy on Earth, as it were: