If a filament resulted in short-term illumination, how did Edison view that specific result pragmatically?

Answer

As a data point confirming that material composition or vacuum level was unsuitable.

Edison's pragmatic view treated outcomes as simple observations, meaning a quick burnout was just data confirming that specific parameters were not suitable for long-term use.

If a filament resulted in short-term illumination, how did Edison view that specific result pragmatically?
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