Precognition Field 

Enchantment
You may look at the top card of your library any time.
You may cast instant and sorcery spells from the top of your library.
{3}: Exile the top card of your library.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Melek, Izzet Paragon 100%
$0.13#7208
"You may cast instant and sorcery spells from the top of your library."
+1 more matching line
Zuko, Exiled Prince 99%
$0.22#4646
"{3}: Exile the top card of your library. You may play that card this turn."
Johann, Apprentice Sorcerer 91%
$0.23#12245
"Once each turn, you may cast an instant or sorcery spell from the top of your library."
+1 more matching line
Chandra, Pyromaster 88%
$0.79#12720
"0: Exile the top card of your library. You may play it this turn."
Mystical Tutor 84%
$16.61#151
"Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top."
Cryptic Pursuit 84%
$0.26#15097
"Whenever you cast an instant or sorcery spell from your hand, manifest the top card of your library."
Jadzi, Oracle of Arcavios // Journey to the Oracle 84%
$0.72#10432
"Whenever you cast or copy an instant or sorcery spell, reveal the top card of your library. If it's a nonland card, you may cast it by paying {1} rather than paying its mana cost. If it's a land card, put it onto the battlefield."
Chandra, Dressed to Kill 81%
$1.64#6434
"+1: Exile the top card of your library. If it's red, you may cast it this turn."
Chandra, Fire Artisan 81%
$0.36#10301
"+1: Exile the top card of your library. You may play it this turn."
Solve the Equation 80%
$3.14#927
"Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle."
Sanar, Unfinished Genius // Wild Idea 80%
$0.27#9245
"Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle."