Actually, Steven Pinker's ¨Words and Meaning¨ points out that irregular verbs are few (<200) but account for 40% of the verbs used in common speach. Essentially, we preparse and cache them, so we don't need the rules.
Even further off-topic, but possibly a lucrative money maker
Posted Oct 10, 2008 8:12 UTC (Fri) by njs (subscriber, #40338)
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That's exactly the problem -- high-frequency words can get away with irregularity, and the higher the frequency the more irregularity they can get away with (is/am/be/are/was/wtf?). But "data" isn't high frequency at all, so speakers are normalizing it to the usual English rules.
Even further off-topic, but possibly a lucrative money maker
Posted Oct 11, 2008 2:50 UTC (Sat) by nix (subscriber, #2304)
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The English title of this book is _Words and Rules_.