 When civil disobedients directly break the law that they oppose – such as Rosa Parks violating the Montgomery, Alabama, city ordinance requiring African Americans to sit at the back of public buses and give up those seats to white riders if the front of the bus filled up – they engage in direct civil disobedience. By contrast, when disobedients break a law which, other things being equal, they do not oppose, in order to demonstrate their protest against another law or policy – such as anti-war protesters staging sit-ins in government buildings – they engage in indirect civil disobedience. The distinction between direct and indirect civil disobedience is mainly relevant to the possibility of mounting constitutional test cases, since one cannot test the constitutionality of a law in court without actually breaching it. Although some scholars argue that direct civil disobedience is preferable to its indirect counterpart because it is most clearly legible as an act of protest against the law breached (C. Cohen 1966, 4–5), most scholars maintain the acceptability of indirect disobedience given that not all unjust laws or policies can be disobeyed directly (M. Cohen 1970, 109–110; Rawls 1999, 320; Brownlee 2012, 19–20). For instance, a same-sex couple living in a jurisdiction that forbids same-sex marriage cannot get married in violation of the law. Black Lives Matter activists cannot directly disobey police brutality, stop-and-frisk policing, or the acquittal of police officers who killed unarmed Blacks. Also, even when a person can engage in direct disobedience of a law, doing so may be unduly burdensome, such as when the punishment for the breach would be extreme.