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.
18/21. 18. A question mark without a number means that particular form of gambling is legal in that state, but the minimum age requirements, if any, are not known. A number with a question mark means there is a state limit, but it is unclear whether it applies.