> > Appearances to the mind are of four kinds. > > > > Things either are what they appear to be; > > > > Or they neither are, nor appear to be; > > > > Or they are, and do not appear to be; > > > > Or they are not, and yet appear to be. > > > > Rightly to aim in all these cases > > > > Is the
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Joober et al. (2012) studied this question.
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