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Systems from a number of vendors were brought in and tested , with the primary criteria being the video and audio quality produced by the units . It should ask that all the faculties of the mind , all the senses , should assemble and take counsel together , and that its claims be passed upon and tested without prejudice , without fear , in the calm of perfect candor . As far as the importance of empire to the modern period goes , we should remember that these ideas were entangled with and tested by the expansion of Europeans into new territories and compromised , if not wholly discredited , by the consolidation and management of the resulting imperial orders .