why it is so hard considering solipsism wrong if even accepting that super dubious statement of that 'the only thing i know existing is my mind' and even further accepting blindly conception of 'all of world can be my illusion' and then realising not all of world is directly controlled to you you think there's 'bum' but stop you can't know whether 'bum' exists then solipsist say 'world is my illusion' but how can one know if the illusion exists if we state that the only thing existing is your mind you can't go then stating something else exists like even works of that mind if you state you live in nothing but how parts of nothing can be different to each other but since you get 'the only thing i know existing is my mind' statement and 'i think therefore i am' conclusion i can ask four questions why if i think then i am why it is stated that i think why i know my mind exists why i know that my mind exists those can be summed with why is my mind is supposed to be the only thing to exist why i know only one thing exists why my mind is that the only thing existing etc as you can see solipsism is unable to answer any of these as it is only concerned about those statement and conclusion