Anchor: Investment in research and development refers to those expenses incurred to support the search for new or refined knowledge and ideas and for the application or use of such knowledge and ideas for the development of new or improved products and processes with the expectation of maintaining or increasing national economic productive capacity or yielding other future benefits.
Entailed: The investment expects the maintenance or increase in the national economic productivity and ideas for developing new products or improving upon products.
Contradiction: Investment in research and development refers to the expenses incurred to support the search for old knowledge and thoughts about the use of old knowledge.
Contradiction: I've reproduced the mathematical proposition in its original state.
Contradiction: People who are perhaps not endowed with quite as much mental acuity and sharpness. 
Contradiction: There is never a difference between weekly actual and evaluated time.
Contradiction: Two elderly people sit outside at the park