Quote: software errors can always be attributed to transient hardware errors

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When problems started occurring [with the Therac-25], investigators assumed that … In fact, a software error can always be … and issues commands to actuators. Without a thorough … possible to determine whether the sensor provided the … did the wrong thing on its own. [For example, a microswitch was blamed for the Hamilton accident.]   Google-1   Google-2

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Quote: early problems with the Therac-25 were blamed on the hardware

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