in reply to How do I print a quote with a perl one liner on dos?

I vaguely recalled that in MS-DOS, two double-quotes was meant to turn into one double-quote. After continuing to experiment in WinNT's CMD interpreter, I find it's a bit inconsistent. 
U:\> perl -e "print $_,$/ for @ARGV"  ""  "'"  '"""'  ''  '"'  '""'  "
+""  "x""x"
__OUTPUT__

'
'"'
''
''  '"'
"
x"x

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