amplifier biotechnology blind experiment camera clock comparable conclusion counting cynicism dna sequencer digital image processing entropy experiment geiger counter hermit human hypothesis image processing information input irreversibility jiddu krishnamurti knowledge marcus aurelius measurement measuring instrument microscope mind naturalistic observation nature observational learning observations and measurements observer effect olfaction optical illusion oscilloscope ph indicator peer review philosophy prediction pseudoscience qualitative quantum mechanics quantum state radio telescope reference frame reproducibility scientific journal scientific method sense sight spectrometer speed of light standard subjective superposition tape recorder taste telescope thermometer tissue culture uncertainty principle voltmeter weighing scale