One way is to try and falsify the equivalence principle, to show that the two phenomena of gravitational and inertial mass are not really identical.

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Inertial mass doesn't depend on gravity.

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Freespace MotionEngine: Hillcrest's new product, the Freespace MotionEngine, is an embedded software platform that provides an integrated solution to enable MEMS inertial and magnetic sensors to work effectively and consistently in mass production.

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