0 completely:
The two politicians have diametrically opposite points of view/are diametrically opposed.
1 completely:
Two new ideological movements, based on diametrically opposed values, arose: militarism and pacifism.
These diametrically opposed policies resulted in the virtual blockage of the counterpart funds until spring 1949.
Consequently, this theory will have a hard time accounting for the sometimes diametrically opposed syntactic conditions that both types of foci can impose.
Consequently, workers and managers could interpret the causes of mobility in diametrically opposite fashion.
They faced ancient and distinguished cultures, many of whose tenets were diametrically opposed to those they advocated.
It would be difficult to find two authors whose ideas were more diametrically opposed.
Presumably due to rather different approaches, the two investigations arrived at almost diametrically opposite conclusions with regard to early bilingual development.
On vegetables, the use of insecticides follows a pattern almost diametrically opposed to that found in rice.