Such verifications are of value for two reasons. [Please select]
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But, though the region of physical theory lies thus behind the world of senses, the verifications of theory occur in that world. [Please select]
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They had seen, as he saw, the futility of all attempts at natural philosophy by mere thinking and arguing, without coming into contact with the contradictions or corrections or verifications of experience. [Please select]
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Well, perhaps it was just as well to wait a little longer and say nothing about it, till he had those last final verifications in his hands. [Please select]
Do you have a better example in your mind? Please submit your sentence!