I think you and I have different definitions of joke. Here's mine.
joke
jok/
noun
1.
a thing that someone says to cause amusement or laughter, especially a story with a funny punchline.
"she was in a mood to tell jokes"
synonyms: funny story, jest, witticism, quip;
Ah, let me present some further reading then. We'll get you up past that grade 4 vocabulary level!!
se·man·tics
s??man(t)iks/
noun
noun: semantics; noun: logical semantics; noun: lexical semantics
the branch of linguistics and logic concerned with meaning. There are a number of branches and subbranches of semantics, including formal semantics, which studies the logical aspects of meaning, such as sense, reference, implication, and logical form, lexical semantics, which studies word meanings and word relations, and conceptual semantics, which studies the cognitive structure of meaning.
the meaning of a word, phrase, sentence, or text.
plural noun: semantics
"such quibbling over semantics may seem petty stuff"
sar·casm
?sär?kaz?m/
noun
noun: sarcasm; plural noun: sarcasms
the use of irony to mock or convey contempt.
"his voice, hardened by sarcasm, could not hide his resentment"
synonyms: derision, mockery, ridicule, scorn, sneering, scoffing; More
irony;
cynicism
"well, it's easy to see that she got her biting sarcasm from her mother"