 But Russell dissented. There are well known problems surrounding accounts of perception that conceive it as a form of direct contact with the world. Among them are the problems arising from the fact that an object can present different and incompatible appearances to different observers. Some neutral monists concluded that “nature is a seething chaos of contradiction” (Holt 1914: 276). But Russell chose to abandon the view that in perception “subject and object merge”. Instead he locates the red patch you see when looking at a tomato in your brain, and distinguishes it from the tomato (from the group of events that constitute the tomato). That is why he can assert that he “know[s] about what is happening in the brain exactly what naïve realism thinks it knows about what is happening in the outside world” (Russell 1927b: 138). This solves the problem of different and incompatible appearances: compatibility is restored by moving the conflicting features away from the single physical object and into the brains of the different percipients. But in making this move Russell abandons the naïve realism of Mach and James and puts a version of representative realism in its place. Thereby the problem of our knowledge of the external world is reintroduced in full  force.[12]