I would say Postman’s concluding claim in this chapter is
that “forms of public discourse regulate and even dictate what kind of content
can issue from such forms” (6). In other words, the way we communicate with
each other limits the type of content that can communicated.
I strongly agree with this brilliant point mainly because of
the points he backs it up with. Postman goes on to explain this by providing
examples of the Indians who communicate with smoke signals. The smoke signals
were their way of long distance communication and they could not have philosophical
arguments simply because the “form excludes the content” (7). The limitations
of that form affected what could be communicated through it. Another example
Postman shows is of a President Taft and how his “grossness” would cause him to
not get elected in the present day even though his political arguments and
policies are sound. “For on television, discourse is conducted largely through
visual imagery, which is to say that television gives us a conversation in
images, not words […] television demands a different kind of content from other
media[…] Its form works against the content” (7). Postman explains that
President Taft would not be elected because of his visual appearance but in a world
without television he was elected because his political arguments were more
important than appearance at the time. Postman shows that the form of discourse
can limit or dictate the content.
I would say his argument
still stays true to this day. “Television gives us a conversation in images,
not words” (7) is still true, but also applies to the Internet. I would say the
Internet has surpassed television as the new medium and now has the primary
influence on the formation of the culture’s intellectual and social preoccupations.
Images are all over the Internet and they have become (in my opinion) the new
medium in which we enforce our understanding of reality. We use images everyday
to contribute to our perception of reality. We perceive things visually we have
never seen through looking at images. You can only visually perceive things by both
going to a place and experiencing it yourself or by just looking an image of
the thing. The photo is a metaphor of the actual thing. Therefore “the medium
is the metaphor”.
Postman also stresses a big deal about the theme of
entertainment. Postman says “all public
discourse increasingly take the form of entertainment” (3) and “the result is
that we are a people on the verge of amusing ourselves to death” (4). He
suggests American Culture is best symbolized by Las Vegas “a city entirely
devoted to the idea of entertainment” (3). I think he is right because nowadays
what sells is what’s entertaining or dramatic. He also shows that this new form
of discourse is affecting us in ways that we do not even realize. Postman is
getting at the idea that everyone is concerned with appearance and entertainment
above all else because of this new medium of images. The medium is dictating the content of the
culture and is causing adverse effects that people aren't even noticing.

Your points are pretty solid for the most part. There are just two things I disagree with. You argue strongly that the Internet is comprised of images rather than text like Postman says television is. I do not think this is right. We definitely do not converse on the Internet primarily through images. We actually use text. We use text on the Internet. It is much more alive on the web than on television. Also, I know you did not create the image, but I find it somewhat illogical. Both pictures are images. And the people on Jersey Shore use just as many words as the people illustrated in the image on the left do.
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