In case of web search, we have to consider not just the
researchers and the scientists or computer professionals, but
also those people who are not used to of using computers as a
medium of information gathering. Boolean model may not be
so useful in case if the web search is being carried out by
novices. Also, in Boolean search, unless otherwise
programmed, the system will not be able to search out for
synonyms because of which the user may sometimes lose the
significant documents. It is seen that the significant
documents also use synonyms in some cases because of which
the documents may not seem similar for Boolean search but
they are actually much related to the topic being searched. For
such cases, it is advisable that the searches are made by using
other techniques like vector space model or the probabilistic
model which may although be challenging to implement yet
yield better results.