A friend walks up to you and says, “Remember what I said yesterday? Well, forget about it.” If you understand all of this, it’s because your friend has made an appropriate assessment of common ground...

A friend walks up to you and says, “Remember what I said yesterday? Well, forget about it.” If you understand all of this, it’s because your friend has made an appropriate assessment of common ground based on

a. copresence for actions.

b. perceptual copresence.