Through very subtle literary techniques, the Torah has the ability to transmit a meaningful message, without stating it explicitly.
A strong example of this technique relates to the question of whether Shmini Atzeret (the "Eighth Day of Assembly") is an independent holiday, or a continuation of Sukkot.
The use of this technique appears in Bemidbar (Numbers) 29:
In verse 12 the Torah describes the Sukkot festival as a 7 day holiday.
This suggests that the 8th day is an independent holiday.
In verse 35, after a list of the 2nd through 7th day, the Torah describes the 8th day.
This suggests that the 8th day is a continuation of Sukkot.
The 2nd through 7th days of Sukkot begin with the conjunctive vav ("vav ha-hibbur"), which is equivalent to the English word “and": "And on the second day... and on the third day... and on the seventh day..." The repeated "and" implies a connection between all the days of the chag.
This suggests that the 8th day is an independent holiday.
Throughout chapters 28-29, when the Festival Mussaf Offerings are detailed, the Torah takes great pains to explicitly list the quantities of Grain Offerings offered with each type of animal for each and every holiday. This is so despite the fact that fixed amounts are offered for a bull, a ram, and a sheep with no deviations or exceptions. The Torah lists the quantities of Grain Offerings for the first day of Sukkot, but skips this detail in the second and seventh days of Sukkot, and concludes that "the Grain Offerings are brought as per the law." Since this detail was mentioned on the 1st day of Sukkot, it need not be repeated again. Likewise, the Torah skips this detail in the section about Shmini Atzeret and states that the Grain Offerings are brought as per the law.
This suggests that the 8th day is a continuation of Sukkot.
The conclusion is subtle but clear: The Torah is purposely ambiguous about the nature of Shemini Atzeret, which is both a continuation of Sukkot on the one hand, and an independent holiday on the other.