I’ve been thinking about absence or opposite of dialogue.
Antonyms are: quiet; silence; monologue; soliloquy (talking to yourself).
A dialogue that isn’t a dialogue is talking to someone who isn’t listening or present in the conversation. That dialogue would be a monologue.
Soliloquy: an utterance or discourse by a person who is talking to himself or herself or is disregardful of or oblivious to any hearers present (often used as a device in drama to disclose a character’s innermost thoughts).
Etymology: from Late Latin sōliloquium a talking to oneself.
Primarily used of theater, particularly the works of William Shakespeare, as a term of art, particularly for finely-crafted speeches. An archetype is the “To be, or not to be” soliloquy in Hamlet. In informal speech or discussions of popular culture, the term monologue is used instead. However, the terms are not precisely synonymous; a monologue is held in the presence and directed towards other characters on the stage, whereas a soliloquy does not acknowledge the presence of any other stage characters if present, and is directed to the audience. https://en.wiktionary.org/wiki/soliloquy
So this blog would be a monologue intended for an audience rather than a soliloquy.
Maybe this series of works where I was playing with the ideas of mono/dialogue might be more in the realm of soliloquy.