Syn przyniósł z przedszkola kserowke że zdaniami i obrazkami to zaznaczenia. Zdania typu
It's a scarf/It's a jacket
Liczba mnoga a napisane w pojedynczej. Powiedzcieczy to jest błąd czy o czymś nie wiem? Czy nie powinno być These are mittens/These are boots?
Natural linguistic reactions are not congenital; they are acquired and must be taught.
"It's" is typical of clefts, truncated or not: "It's the Americans! (who went to the moon first.)
"It's not Masachussets; it's Massachusetts" would be a natural reaction to a misspelled word. You can easily figure out the duty that "it" does here: just count the syllables that one would have to expend to name the syntactic subject that "it" replaces. Language hates redundancy, and Redundancy Theory shows its power.
"It's the mittens that got lost, (not the socks)."
"It's mittens!" would be a natural reaction to signal successful discovery.