Error with (Lab 2.2: How Many Inserted?)

look at this carefuly and tell me how many documents will be created. The corrector said 4 is the good answer however I answered 5 because of the “ordered” = false.

db.myMovies.insertMany(
[
{
“_id” : “tt0084726”,
“title” : “Star Trek II: The Wrath of Khan”,
“year” : 1982,
“type” : “movie”
},
{
“_id” : “tt0796366”,
“title” : “Star Trek”,
“year” : 2009,
“type” : “movie”
},
{
“_id” : “tt0084726”,
“title” : “Star Trek II: The Wrath of Khan”,
“year” : 1982,
“type” : “movie”
},
{
“_id” : “tt1408101”,
“title” : “Star Trek Into Darkness”,
“year” : 2013,
“type” : “movie”
},
{
“_id” : “tt0117731”,
“title” : “Star Trek: First Contact”,
“year” : 1996,
“type” : “movie”
}
],
{
ordered: false
}
);

well there are two documents that have the same id so one of them should error to a duplicate key error and not be inserted