[□ | □] □
[□=□ | □] □
[□ | □ | □] □
Mass production of a retargeted virus was not possible before this specific innovation of the molecular tag - - and research in this area was at an impasse . Of whatever nature might be the hidden change wrought in Rex by the disappointment of his first love , it was apparently quite secondary to that evidence of more serious ambition which dated from the family misfortune ; indeed , Mr. Gascoigne was inclined to regard the little affair which had caused him so much anxiety the year before as an evaporation of superfluous moisture , a kind of finish to the baking process which the human dough demands . A woodpecker once , in course of domestication , was seen to insert an almond into a hole in a piece of timber , so that it might remain steady under its pecking ; at the third peck it split the shell of the fruit , and then ate the kernel . Those predicates , again , cannot form a unity , of which the one is implicit in the other : thus we cannot combine the predicate ' white ' again and again with that which already contains the notion ' white ' , nor is it right to call a man an animal-man or a two-footed man ; for the notions ' animal ' and ' biped ' are implicit in the word ' man ' . Snow cover acts as an insulator of the soil and plants . Those very pursuits had led to an impasse .