why does instanceof relapse fake literals?

"foo" instanceof twine //=> false
"foo" instanceof vigilant //=> false
true instanceof boolean //=> false
true instanceof vigilant //=> false
false instanceof boolean //=> false
false instanceof vigilant //=> false

// tests opposing vigilant unequivocally don't sense

array literals vigilant literals match...

[0,1] instanceof array //=> true
{0:1} instanceof vigilant //=> true

why don't them? or, since don't not?

and, an instance of, then?

it's same ff3, ie7, opera, chrome. so, during slightest it's consistent.

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missed few.

12.21 instanceof array //=> false
/foo/ instanceof regexp //=> true