Decoding, on the other hand, is carefully defined in the standard. Most decoders are "bitstream compliant", which means that the decompressed output that they produce from a given MP3 file will be the same, within a specified degree of rounding tolerance, as the output specified mathematically in the ISO/IEC high standard document (ISO/IEC 11172-3). Therefore, comparison of decoders is usually based on how computationally efficient they are (i.e., how much memory or CPU time they use in the decoding process).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Decoders are usually compared by examining which factor?
Ah, so.. computationally efficient

The United States took control of the island in the 1898 Spanish–American War, as part of the Treaty of Paris. Guam was transferred to U.S. Navy control on 23 December 1898 by Executive Order 108-A. Guam came to serve as a station for American ships traveling to and from the Philippines, while the Northern Mariana Islands passed to Germany, and then to Japan. A U.S. Navy yard was established at Piti in 1899, and a marine barracks at Sumay in 1901.:13 Following the Philippine–American War, Emilio Aguinaldo and Apolinario Mabini were exiled on Guam in 1901.:vi
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did the United States take control of the island?
Ah, so.. 1898

Whereas Greg had limited his illustrative examples to English Renaissance drama, where his expertise lay, Bowers argued that the rationale was "the most workable editorial principle yet contrived to produce a critical text that is authoritative in the maximum of its details whether the author be Shakespeare, Dryden, Fielding, Nathaniel Hawthorne, or Stephen Crane. The principle is sound without regard for the literary period." For works where an author's manuscript survived – a case Greg had not considered – Bowers concluded that the manuscript should generally serve as copy-text. Citing the example of Nathaniel Hawthorne, he noted:
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): According to Bowers, the manuscript should not serve as what?
Ah, so..
unanswerable