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.
A check mark, checkmark or tick is a mark ( , , etc.) used (primarily in the English speaking world) to indicate the concept âyesâ (e.g. âyes; this has been verifiedâ, âyes; that is the correct answerâ, âyes; this has been completedâ, or âyes; this [item or option] applies to meâ).