A demurrer typically attacks one or more entire causes of action for failure to state facts sufficient to constitute a claim. The court looks only to the face of the pleading or to those things that are judicially noticeable.
EXAMPLE: Complaint alleges conversion of real property, which is not a recognized tort. File a demurrer.
A motion to strike typically attacks an entire pleading or specific words in the pleading where the words are irrelevant or the words or pleadings are not drawn in conformity with the law. The court looks only to the face of the pleading or to those things that are judicially noticeable.
EXAMPLE: The complaint claims punitive damages for negligence. File a motion to strike the words “punitive damages.”
If a complaint alleges conversion of real property (invalid tort) and personal property (valid tort), then the complaint would survive a demurrer because the perosnal property allegation would immunize the entire cause of action from demurrer. File a motion to strike against the specific words in the complaint that refer to “real property.”
A motion for summary judgment considers all evidence and basically alleges that a party is entitled to judgment based upon a lack of a triable issue of fact.