Assertion: hertz | /r/CapableOf | use double standard
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Source sentences:
text: The main argument is: Hertz held his detector vertically at all times but used a double standard when interpreting the cause of the sparks at the gap of his detector: on one hand he used electromagnetic induction (for the magnetic component, dotted wave in his diagram), but on the other hand claimed electric field (for the electric component, full line in his diagram).