I believe the answer is: <span>Müller-Lyer Illusion
The </span><span>Müller-Lyer illuison is consist of a set of three arrow-like figures, where the head of the second arrows would be drawn on the opposite direction than the first.
When the participants are asked to determine which arrows are longer after discounting the arrow-head, most people see the arrow with backwards head placement has the longer line even though the length of all arrow lines are the same.</span>
Stateful firewalls are most attractive because of their low cost!
Which of the following would be the most likely diagnosis? .... A "John Doe<span>" </span>walked into<span> the </span>police station<span> and </span>reported<span> that </span>he had<span> an </span>unusual problem<span>. </span>He could not remember anything<span> about </span>himself,not<span> where </span>he lived<span> or </span>worked<span> or </span>even his name<span>. The </span>police took him<span> to the </span>local hospital<span> where </span>he<span> was</span>evaluated<span> and </span>found<span> ...</span>