"The purpose of a thought-experiment, as the term was used by Schrodinger and other physicists, is not to predict the future - indeed Schrodinger most famous thought experiment goes to show that the "future," on the quantum level, cannot be predicted - but to describe reality, the present world. Science fiction is not predictive; it is descriptive. Predictions are uttered by prophets (free of charge), by clairvoyants (who usually charge a fee, and are therefore mor honored in their day than prophets), and by futurologists (salaried). Prediction is the business of prophets, clairvoyants, and futurologists. It is not the business of novelists. A novelist's business is lying. Science fiction is not predictive; it is descriptive. Predictions are uttered by prophets (free of charge), by clairvoyants (who usually charge a fee, and are therefore mor honored in their day than prophets), and by futurologists (salaried). Prediction is the business of prophets, clairvoyants, and futurologists. It is not the business of novelists. A novelist's business is lying."