To classify a ruling, distinguish the transmission of a text from its indication of a particular ruling. Whether wording is securely transmitted and whether it admits only one legally relevant interpretation are distinct questions.
The Qur'anic text, for example, has definitive transmission, but particular expressions can admit more than one recognized interpretation. A subsidiary ruling inferred from such wording may therefore remain disputed at the level of indication.
Thus “the verse is in the Qur'an” and “this specific subsidiary ruling follows from that verse with certainty” are not always equivalent. This distinction helps explain the difference between fard and wajib.