HTML: Why script tags should always have full ending?

Answer 1

http://stackoverflow.com/questions/69913/why-dont-self-closing-script-tags-work

Answer 2

W3.org - 18.2.1 The SCRIPT element

<!ELEMENT SCRIPT - - %Script;          -- script statements -->
<!ATTLIST SCRIPT
  charset     %Charset;      #IMPLIED  -- char encoding of linked resource --
  type        %ContentType;  #REQUIRED -- content type of script language --
  src         %URI;          #IMPLIED  -- URI for an external script --
  defer       (defer)        #IMPLIED  -- UA may defer execution of script --
  >

Start tag: required, End tag: required