"Stupider and stupidest are real words in good standing. While there are many (often contradictory) rules on comparative and superlative adjectives, there is no rule against stupider and stupidest, and the words have a long history of usage." According to Merriam-Webster.
Maybe you should go back to 1 of those woke universities with now about 98 person pronouns and eliminated other perfectly good words not to offend some doofus snowflake with orange & green hair. Or maybe that trading school for dolts or where ever you got your trading as a dummy rules.
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