Because every one of them have passed what is called the Knowledge: a test of the ability to memorize and spatially navigate every one of those 25, 000 streets.
Test your knowledge on the American Revolution with a few of the following questions.
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You can test your knowledge of how the law applies to your life online here.
Try this quiz from the US Centers for Disease Control and Prevention to test your knowledge of antibiotics.
The exams test your knowledge of such things as how to calculate the duration of a bond and the ethics of accepting a stock tip.
Most recently, IWV commissioned a study in Colorado, which began with a baseline survey of 800 Independents to test their knowledge about key economic facts.
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Trade in 19th-century events flashcards and test your knowledge of indulgence with the hotel's complimentary European continental breakfast, Wednesday wine and cheese receptions and afternoon tea.
To test their knowledge of the country they're playing for, The Wall Street Journal quizzed four of Spain's American-born players on some basic elements of Spanish culture, history and government.
Well, it's probably one of the better questions with which to test the knowledge of our Engadgeteers -- so, dear friends, if you've been down this road before, what would you recommend?
Perhaps most vital, we feel inspired by the unexpected beauty of a new climate, by the knowledge that we can test our physical limits, survive the trek, and reap the rewards of a breathtaking summit.
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And if dead and decomposing bodies aren't your thing you can test your knowledge of the rules of taxonomic nomenclature by suggesting new names for five species of deep-sea worm, recently discovered around hydrothermal vents off Antarctica.
They are stimulated to think outside the box and experiment to test their new knowledge.
They also have to complete a screen-based test of their knowledge of the Highway Code.
Which reminds me: Can we, as the GOP base, demand an IQ exam as well as a test of basic knowledge from our congressional and presidential candidates?
Tony, a tough little Cockney from London's East End, wanted to be a jockey and didn't make it, but he managed to pass The Knowledge, the formidably difficult test for London taxi drivers, then buy his own taxi and earn a good living for himself and his family.
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But in a discovery-driven process, the goal is to identify assumptions, test them and gain knowledge as fast and cheaply as possible.
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This year there was no test of memorised basic knowledge in the Chinese language exam in Shanghai - only reading comprehension and creative writing.
In order to advance in rank or earn a specific qualification insignia such as lead the watch team in the reactor plant, a qualification board is organized with a sailors superiors and qualified peers to test his or her knowledge.
"Schools under increasing pressure due to the banding system, often opt for qualifications which are easier to pass rather than qualifications which build and test young people's knowledge and skills, " he said.
Earlier this week, the Bush administration moved to defuse some of the criticism by relaxing test requirements for students with limited knowledge of English.
Prior to the beginning of classes, learners are required to take an assessment test aimed at verifying their entry knowledge on basic literacy and numeracy through the identification of letters, syllables, words, sentences, numbers, arithmetic operations and writing down their personal details.
Sir Declan, sitting with Lord Justices Higgins and Girvan, held that the test applied by the trial judge required no knowledge of the attack until a rendezvous with the gunmen.
It will encourage knowledge exchange, regional networking and catalyse innovation by helping to design and test new approaches to education.
Knowledge about basic maintenance of a car will now be a feature of the practical test set by the Driving Standards Agency.
In Dr Djerassi's future world, men and women will have their sperm and eggs frozen in their 20s and then undergo sterilisation, free to pursue their professional and sexual interests content in the knowledge that their cells can be safely resurrected and reliably made to unite in a test-tube whenever they want a child.
Environmentalists say public knowledge of the chemicals can help landowners near oil and gas projects know what types of pollution to test for in their groundwater.
Schools nationwide are lengthening school hours, piling homework on burdened kids and cramming technology into classrooms with the goal of improving test scores as politicians intensify the debate with educators demanding measures be taken to close the knowledge gap between the United States, Asia and Europe.
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The prize winner for application ideas concerning literacy was Test On Texts by Sanjith Yeruva (India), a mobile application that helps students assess their knowledge via text questions and suggests content in an intuitive manner.
He told BBC News that the journal article described everything needed to establish the test in a forensic lab, but that the team was also in touch with industry regarding their knowledge about hair and eye colour prediction.
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