In the early 20th century, many Europeans (particularly Spaniards and Italians but also thousands from Central Europe) immigrated to the city. In 1908, 30% of the city's population of 300,000 was foreign-born. In that decade the city expanded quickly: new neighbourhoods were created and many separate settlements were annexed to the city, among which were the Villa del Cerro, Pocitos, the Prado and Villa Colon. The Rodo Park and the Estadio Gran Parque Central were also established, which served as poles of urban development.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The Rodo Park and the Estadio Gran Parque Central serves as poles of what?
Ah, so.. urban development

where the uncertainty is given as the standard deviation of the measured value from its expected value. There are a number of other such pairs of physically measurable values which obey a similar rule. One example is time vs. energy. The either-or nature of uncertainty forces measurement attempts to choose between trade offs, and given that they are quanta, the trade offs often take the form of either-or (as in Fourier analysis), rather than the compromises and gray areas of time series analysis.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What forces measurement attempts to choose between trade-offs, in quanta?
Ah, so.. either-or nature of uncertainty

On October 21, 1959, Eisenhower approved the transfer of the Army's remaining space-related activities to NASA. On July 1, 1960, the Redstone Arsenal became NASA's George C. Marshall Space Flight Center, with von Braun as its first director. Development of the Saturn rocket family, which when mature, would finally give the US parity with the Soviets in terms of lifting capability, was thus transferred to NASA.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The Redstone Arsenal became the George C. Marshall Space Flight Center when?
Ah, so..
July 1, 1960