What prefix that can be added to logical?

Here are some prefixes that can be added to "logical" and what they mean:

* Il-: Meaning "not" or "the opposite of". Example: illogical (not logical).

* A-: Meaning "not" or "without". Example: alogical (not logical, lacking logic).

* Non-: Meaning "not" or "the opposite of". Example: non-logical (not logical).

* Un-: Meaning "not" or "the opposite of". Example: unlogical (though less common, it's possible).

* Pseudo-: Meaning "false" or "imitation". Example: pseudo-logical (appearing logical but not actually being so).

The best prefix to use depends on the specific context and the nuance you want to convey.