Lossy compressors don't have the same constraints as a lossless compressor. If you data your input, compress it, and then decompress it, the output is not identical to the input. This allows the compressor to potentially compress the data far more than even the ideal lossless compressor hypothesized above.
The question mark (?), also known as the interrogation point, query, and eroteme, is a punctuation mark that indicates an interrogative clause, or phrase in many languages. The question mark is not used for indirect questions.
To denote; mean: A red traffic light signifies that traffic must stop. 2. To be a sign or indication of; suggest or imply: The test results will signify how serious the problem is. The surge in housing starts signifies an upturn in the economy. 3. To make known, as with a sign or word: He signified his disagreement with a frown.