Subject is the unstated "you"; two verbs are "read" and "learn."
unstated main ideas are statements that have no topic.
What was the unstated goal of the Wilmot Proviso?
The anagrams are unstated and untasted.
Implicit statements are ideas or messages that are not directly stated but can be inferred from context or underlying meanings. They rely on subtlety and interpretation by the listener or reader to understand the implied meaning.
A fact left out of an argument.
Traditionally, yes, but many modern "authorities" accept single words or other fragments of traditional sentences as full sentences. Also, note that sentences with verbs in the imperative mood usually have an implicit but unstated subject, "you".
An Implication
Topic Sentence
The simple subject is the implicit pronoun "you", the natural subject of an imperative mood verb such as this sentence contains. "Class" is an appositive to the unstated "you" and should be followed by a comma, as is normal for an appositive that is the first word of a sentence.
The verb phrase "take cover" is in the imperative mood in this sentence. The imperative mood is an order, as when you tell someone to do something. The unstated subject of the sentence is "you": "[You] take cover..."
The verb phrase "take cover" is in the imperative mood in this sentence. The imperative mood is an order, as when you tell someone to do something. The unstated subject of the sentence is "you": "[You] take cover..."