If beer is supposed to incorporate the three-step process of properly pouring beer, and it is desired to build a 1-inch head on top of a beer, then why is it so common that beer is poured in a half hazard manner without head?

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The Answer of If beer is supposed to incorporate the three-step process of properly pouring beer, and it is desired to build a 1-inch head on top of a beer, then why is it so common that beer is poured in a half hazard manner without head?

If Beer Is Supposed to Incorporate the Three-Step Process of Properly