11.   And there an unusually abstract idea of photography reigned.

12.   Climate change may still be rather an abstract idea to most of us, but in the Arctic it is already having dramatic effects.

13.   He links abstract ideas to paintings, buildings, furniture, the landscape and all the other concrete objects he includes in the vast range of American art.

14.   It is a moral challenge to determine how to comport oneself simultaneously in relation to abstract ideas and a recalcitrant world.

15.   Its first program was called experimental animation, and focused on the exploration of new, abstract ideas and conceptual techniques.

16.   They learned to formulate theorems, draw meaning from abstract ideas and communicate thoughts.

17.   Though he complains about the restraints of television, the medium actually affords him a counterpoint for abstract ideas even as it turns the country into a giant museum.

18.   Until now, the Unabomer has just been an abstract idea.

19.   When you began on abstract ideas, you could see her eyes clouding over, her eyelids became heavy.