MC33814 MC33813 VRS de-glitch how work?

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There is control bit VRS De-glitch, but no description seems very effective, How does it work?

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Issues searching for de-glitch. Is is there in datasheet. 5.7.2.5VRS deglitching filters
The VRS input circuit has additional filters on the rising and falling edges of the input waveforms to reduce the effect of short transitions occurring during noise sensitive times. The deglitching filters are approximately 1 % of the last positive pulse period. The deglitch filters are enabled by setting the deglitch bit (bit 3) in the SPI VRS miscellaneous parameters configuration register. This bit is, by default, zero (0), meaning the deglitch filters are disabled.

How can English become a world language, if is not spelled consistently, let alone phonetically? 

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