There's this thing called statistics and there are these things called multivariate models of regression. Admittedly the longer the study goes on the weaker the statistical power gets, but you can scientifically test for causality like this.
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“I always believe the movies I've made are smarter than the way they are perceived by sort of mass culture and by the critics,” Snyder said, a statement he immediately followed by saying, “Also, ‘It looks like a video game.’
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