Here's why:
* Comparative: "More ignorant" or "less ignorant" can be used, but they are usually avoided in formal writing. It sounds awkward and implies there are degrees of being uninformed.
* Superlative: "Most ignorant" is also possible, but it's rarely used for the same reasons as the comparative form.
Instead of using comparative or superlative forms, consider these alternatives:
* To express a greater degree of ignorance: Use adverbs like "completely," "totally," "utterly," "extremely," or "deeply" to modify "ignorant." For example: "She was completely ignorant of the situation."
* To express a lesser degree of ignorance: Use adverbs like "somewhat," "slightly," "partially," or "relatively." For example: "He was somewhat ignorant of the local customs."
* Use different words: Consider words like "unaware," "uninformed," "uneducated," or "naive" to express different shades of meaning related to a lack of knowledge.
Remember, using the comparative and superlative forms of "ignorant" can sometimes sound harsh or judgmental. Choosing more nuanced language can help you express your meaning more effectively and sensitively.