" Novaes, Standard Model: An Introduction, hep-ph:0001283 I. Models are usually man-constituted . That justifies talking about their purpose prior to talking about their consistency. Models are used as substitutes for originals because properties of the latter are of interest and the originals are not going to be investigated themselves. There may be a number of reasons for that such as taboos preventing from studying the original itself, or inability, the involved cost in terms of resources or moral damage being intolerable, or similar. For an investigator I it makes only sense to consider an entity M as a substitute of an entity O, if I can (1) establish an analogy, similarity, or similar relation between M and O that permits the substitution of O by M with respect to purpose and means, time-horizon etc. , and (2) I can actually investigate M in the required way. Kit Model Plastic Ship Size Super That implies firstly that M does not have the properties of O that prevent I from investigating O. Also other properties of O may not be properties of M. "

". ] In order for an advertising message to be perceived, the brain of the television viewer must be available. Our broadcasts are aimed at making that brain available: i. e. by distracting it, by relaxing it and preparing it between two messages. What we sell to Coca-Cola is time with this available human brain. " Sourcing The third filter concerns the mass medias' need for a continuous flow of information to fill their demand for daily news. Model Ship Magazine In an industrialized economy where consumers demand information on numerous global events unfolding simultaneously, they argue that this task can only be filled by major business and government sectors that have the necessary material resources. This includes mainly The Pentagon and other governmental bodies. "