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Why are rapid fluctuations in an active galaxy's luminosity evidence for a supermassive black hole?
Unaddressed Envelope
An envelope lacking a specific destination address, often used for general mail distribution or marketing purposes.
Promissory Estoppel
A legal principle that prevents a party from withdrawing a promise made to a second party if the latter has reasonably relied on that promise to their detriment.
Foreclose
The legal process by which a lender attempts to recover the balance of a loan from a borrower who has stopped making payments to the lender by forcing the sale of the asset used as the collateral for the loan.
Consideration
The value (such as money, goods, or services) that is exchanged between parties in a contract.
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