n4 We are aware that under Maryland's common law outside the arbitration context, absent some specific agreement or statute governing the nature of the notice to be given, an offeror may not be obligated to give an offeree a specific description of the nature of the contract changes.

    "The rule [that an offer may be communicated by conduct or by words, but must be communicated] does not mean that all the terms of the offer must be actually known by the offeree. A man may give his assent to terms when the knowledge of them is merely imputed to him, upon the general principle that notice is often equivalent to knowledge." "The acceptance of a paper which purports to be a contract sufficiently indicates an assent to its terms whatever they may be, and it is immaterial that they are, in fact, unknown." Therefore, if [the offeree's] actions were sufficient to constitute acceptance, that acceptance would extend to all the provisions of the written contract. 

    We leave for another day the issue of whether this principle would apply to the addition of an arbitration clause when there was no contractual obligation to describe the change in terms.