reality

how do we know something is real... we cant rely on our sight, people can have visual hallucinations and our eyes can play tricks on us... there is a whole slew of visual oddities and magic based on these priciples... can we rely on our hearing, no .. that again can be tricked .. smell... nope trickery afoot there too... touch, maybe but then what about us is real aside from our bodies, are our minds and our thoughts then ever truly real, do we know the difference and if so how can we tell?