Seven of the 24 students "remembered" the false event in their packets.

CNN: Trust your memory? Maybe you shouldn't

She adds, however, that the cost of those devices can be high and that they may turn off gas in the event of a false alarm.

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Victory in the season's first event, in Monte Carlo, was something of a false dawn for Mitsubishi and Tommi Makinen, chasing an unprecedented fifth consecutive world rally championship.

BBC: Mitsubishi: Hanging on with aging weapon