quality:corruption
Example

Consider a string of the letters "ab̲c𐐀"—that is, a string containing a Unicode combining character (U+0332 ̲ COMBINING LOW LINE) as well a supplementary character (U+10400 𐐀 DESERET CAPITAL LETTER LONG I). This string has several Unicode representations which are logically equivalent, yet while each is suited to a diverse set of circumstances or range of requirements:

Note in particular that 𐐀 is represented with either one 32-bit value (UTF-32), two 16-bit values (UTF-16), or four 8-bit values (UTF-8). Although each of those forms uses the same total number of bits (32) to represent the glyph, it is not obvious how the actual numeric byte values are related.