We have failed to protect science against speculative extensions of nature, continuing to assign physical and mathematical properties to hypothetical entities beyond what is observable in nature. Robert Lanza
Science has to be understood in its broadest sense, as a method for comprehending all observable reality, and not merely as an instrument for acquiring specialized knowledge. Alexis Carrel
Every one knows, that the mind will not be kept from contemplating what it loves in the midst of crowds and business. Hence come those frequent absences, so observable in conversation; for whilst the body is confined to present company, the mind is flown to that which it delights in. Mary Astell
The future will be determined in part by happenings that it is impossible to foresee; it will also be influenced by trends that are now existent and observable. Emily Greene Balch
Hempseed produces no observable high for humans or birds. Jack Herer
observable in French is apercevable
observable in German is bemerkenswert, bemerkenswert
observable in Italian is percettibile, notevole
observable in Spanish is perceptible
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