No, this is Google throwing the cheapest possible shit at you that is barely capable of stringing together 5 coherent sentences and has the reasoning capability of a tapeworm.

Here is the output of the minimalist open Chinese model Qwen3, that runs locally on my 6 year old mid-end PC:

The US states that contain the letter "d" (case-insensitive, as state names are typically capitalized) are as follows. I've verified each state name for the presence of the letter "d" in its standard spelling:

    Colorado (contains "d" in "Colorado")  
    Delaware (starts with "D")  
    Florida (contains "d" in "Florida")  
    Idaho (contains "d" in "Idaho")  
    Indiana (contains "d" in "Indiana")  
    Maryland (ends with "d" in "Maryland")  
    Nevada (contains "d" in "Nevada")  
    North Dakota (contains "d" in "Dakota")  
    Rhode Island (contains "d" in "Rhode")  
    South Dakota (contains "d" in "Dakota")  


Total: 10 states.