I am in agreement and disagreement with the author at the same time. I like that the author really makes it a point to clarify that there are degrees of interactivity and that refrigerator is a low level (zero) and conversation is a high level. But I don’t agree with his way of doing away with all the other media and claiming they are zero interactivity e.g. film, music. The claim that there are degrees of interactivity should be justly applied to these media as I think a medium like film is very much interactive as it has the viewer and the maker in a continuous conversation, albeit the method of conversation is a little different than 1:1 live conversation.
I think the author is biased toward high interactivity activities and is ridiculing other media and reducing their significance to interactivity. In my eyes, interactivity or interactive media is anything that someone interacts with, and film and music are perfectly interactive as is conversation. Just as the author says, in even real life conversations, there isn’t a perfect interative conversation ever because there are so many requirements for it. Building off this point, things like film and music are equal to normal conversations on the scale of interactivity.