There are various other arguments, but the complete picture suggests to me
that both are true. Words are stored as wholes, with vowels, but that
abstractions are made (mostly without awareness) of consonantal skeletons
that are invariate across many related forms. The preponderance of written
Hebrew without vowels would reinforce such abstraction I think.
Just some thoughts on the matter,
regards
Matthew Anstey
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Vrije Universiteit, Amsterdam
Faculteit der Godgeleerdheid
"Werkgroep Informatica"
anstey AT postmark.net