5 ms·
No, it's not. It can be used by a single, blind person, be it a human or not.
by test-it 13y ago
No, it's not. It can be used by a single, blind person, be it a human or not.
- foobarbazqux 13y agoHuman senses are always used to make measurements, but yes, an individual human can agree with himself by repeating scientific experiments.