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The yeast will eat it. The only issue is your original gravity can not be measured at time of yeast pitch as all the sugar not mixed. We sponsored a homebrew comp a few year back and the one mead maker simply dumped the honey in a jug,filled with water and then pitched in some yeast. It did fermented. i do not know how completely as did not have OG/FG info.
I imagine that the meadery had a good handle on the sugar content of its honey, which occasional meadmakers probably don't have.