Or [do they think] that the hidden reality [of all that exists] is almost within their grasp, so that [in time] they can write it down?

Or that the Unseen in it their hands, and they write it down?

Or possess they the Unseen so that they can write (it) down?

Or possess they the unseen, so they write (it) down?

Or have they [knowledge of] the unseen, so they write [it] down?