A&E goes out of their way to encourage the Robertsons to speak out and then they pretend to be surprised by Phil's belief. Obviously, A&E can air whatever they want...

I think the whole thing is probably just a publicity stunt. The question would be whether or not Phil contributed knowingly.
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In the legend of King Arthur, the Fisher King was a renowned angler whose errant ways caused him to be struck dumb in the presence of the sacred chalice. I am no great fisherman, and a steelhead is not the covenant of Christ, but with each of these fish I am rendered speechless.