If the contractual terms are uncertain or incomplete, the parties do not reach an agreement in the eyes of the law.  An agreement is not a contract and the inability to agree on key issues that may include elements such as price or safety may lead to the failure of the entire contract. However, a court will endeavour to implement commercial contracts where possible by excluding an appropriate design of the contract.  (f) A agrees to sell to B “my white horse for the rupees five hundred or a thousand rupees.” There is nothing to show which of the two prizes was to give. The agreement is not done. If the contract contains uncertain or incomplete clauses and all options for resolving its actual importance have failed, it may be possible to separate and invalidate only the relevant clauses if the contract contains a deterrent clause. Examining the separation capacity of a clause is an objective test – if a reasonable person would see the contract succeed without the clause. A company and a financial advisor have entered into an agreement authorizing the advisor to sell a third party`s financial products for a fee. In the second half of the 20th century, English law had openly accepted that its mission was to support the parties, where the contractual formulation that they agreed clearly showed that they wanted to be linked. In 1967, Lord Denning considered a five-year chicken sale contract. The number of hens had been agreed for the first year, but had to be “agreed” for the remaining four years. The contract contained a compromise clause. It was binding on the parties because, without agreement, the arbitrator could decide at any time how many chickens were reasonably to be supplied in a given year (F-G Sykes (Wessex) Ltd/Fine Fare Ltd  1 Lloyd`s Rep 53).
Lord Denning stated that, as we shall see, the courts ultimately applied English law, so that in the second half of the 20th century the treaties of English law had been openly maintained. They slowly come to the conclusion that the agreements between the trade parties, which appear to be linked and were prepared to bear the costs of conducting their negotiations, are too uncertain to be enforceable. The cases show that it is much better to take the time to spell things in writing from the outset, otherwise the law can fill the gaps with potentially undesirable results for either party. It`s a lesson to be repeated. A contract whose more than one meaning, when built, can produce more than one result in its application is not zero for uncertainty. A contract is declared to uncertainty only if its essential conditions are uncertain or incomplete, unless the uncertain party, which is not essential, is separated, so that the balance of the agreement remains intact.