"Phytic acid (reduces some micronutrient absorption) is just as high in nuts as they are in legumes, and yet nuts are not excluded from Paleo. " Paleo treats nuts as an acceptable snack, not as a primary food group.
"Tannins are just as high in wine, and oxalates are just as high in spinach, but these are not excluded from Paleo." Primal accepts a glass of wine or tea, Paleo does not. Mark is more giving. Spinach has a lot of redeeming qualities.