[Usability] triple mouse click behavior

[John F Dixon Iv <John Dixon ndsu nodak edu>]

Please correct me if i am wrong, but in most/all applications triple 
clicking on text selects the entire line, correct? (I haven't really 
examined this issue deeply) I don't know for whom or why this is useful. 
If someone could provide an example, i would love to hear it, i am 
genuinely interested. Personally, i rarely, if ever use it. On the other 
hand, when using word processors for example, i frequently cut and paste 
individual sentences to move them around inside my documents. What would 
be the pros and cons of making triple mouse clicks select an entire 
sentence for some applications such as word processors? Personally, i 
think this would be a great improvement. Selecting a sentence is 
relatively hard because it requires such fine motor coordination 
especially if you want to select the punctuation and white space exactly.

John