Julie: Sarah told me. A blog.
Eirc: Of what?
Julie: What do you mean "of what"? A blog of Annabelle. Of every thought that passes through her brain. Her stupid, vapid, insipid I could write a blog. I have thoughts.
Eric: And you're a writer, which is more than I can say for Annabelle.
I always think I can say should be used at the beginning of sentences.
For example: I can say he is good at sports etc.