Under the Parol Evidence Rule, what is the effect of changing or contradicting terms in a written deal?

Does the Parol Evidence Rule allow evidence of defenses to enforcement? How does a limitation on remedies affect warranties? How do you determine who is liable for risk of loss? How do you identify express warranties? How is the Parol Evidence Rule handled under UCC? Under the Parol Evidence Rule, is parol evidence admissible to clarify ambiguities? Under the Parol Evidence Rule, what is the effect of a clerical mistake in integration? Under the Parol Evidence Rule, when are conditions precedent admissible? Under the Parol Evidence Rule, when will a court allow terms to be added to a written deal? Under the UCC, how is privity a limitation on warranty liability? Under the UCC, in determining the seller's delivery obligations while using a common carrier, what is FOB (Free on Board)? Under the UCC, in determining the seller's delivery obligations while using a common carrier, what is FAS (Free Alongside)? Under the UCC, in determining the seller's delivery obligations while using a common carrier, what is CIF (Cost, Insurance, and Freight) and CF (Cost and Freight)? Under the UCC, what is the effect of a buyer examining goods before acceptance? Under the UCC, what is the statute of limitations on warranties of quality? Under the UCC, when does risk of loss pass to which party when using a non-common carrier? Under the UCC, which warranties can be disclaimed? What are destination contracts? What are shipment contracts? What are the default warranties of quality available under the UCC? What is a merger clause? What is an implied warranty of fitness for a particular purpose? What is an implied warranty of merchantability? What is an integration? What is a partial integration? What is parol evidence? What is the Parol Evidence Rule? When may conduct be a source of contract terms?