The primacy of the composer's written score has also led, today, to a relatively minor role played by improvisation in classical music, in sharp contrast to the practice of musicians who lived during the baroque, classical and romantic era. Improvisation in classical music performance was common during both the Baroque and early romantic eras, yet lessened strongly during the second half of the 19th and in the 20th centuries. During the classical era, Mozart and Beethoven often improvised the cadenzas to their piano concertos (and thereby encouraged others to do so), but they also provided written cadenzas for use by other soloists. In opera, the practice of singing strictly by the score, i.e. come scritto, was famously propagated by soprano Maria Callas, who called this practice 'straitjacketing' and implied that it allows the intention of the composer to be understood better, especially during studying the music for the first time.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the name for the practice of singing strictly by the score in opera?
Ah, so.. come scritto

Unmarked vehicles are used primarily for sting operations or apprehending criminals without alerting them to their presence. Some police forces use unmarked or minimally marked cars for traffic law enforcement, since drivers slow down at the sight of marked police vehicles and unmarked vehicles make it easier for officers to catch speeders and traffic violators. This practice is controversial, with for example, New York State banning this practice in 1996 on the grounds that it endangered motorists who might be pulled over by people impersonating police officers.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When do police often use marked cars?
Ah, so.. unanswerable

A look at one minority leadership strategypartisan oppositionmay suggest why it might be employed in specific circumstances. The purposes of obstruction are several, such as frustrating the majority party's ability to govern or attracting press and media attention to the alleged ineffectiveness of the majority party. "We know how to delay," remarked Minority Leader Gephardt Dilatory motions to adjourn, appeals of the presiding officer's ruling, or numerous requests for roll call votes are standard time-consuming parliamentary tactics. By stalling action on the majority party's agenda, the minority leader may be able to launch a campaign against a "do-nothing Congress" and convince enough voters to put his party back in charge of the House. To be sure, the minority leader recognizes that "going negative" carries risks and may not be a winning strategy if his party fails to offer policy alternatives that appeal to broad segments of the general public.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What was Gephardt Dilatory accused of being a part of?
Ah, so..
unanswerable