How do we know that what I see as red is red. If your red is my yellow I have stll been taught that it is red.

Question: How do we know that what I see as red is red. If your red is my yellow I have stll been taught that it is red.
- Keywords:
  colour,
  red,
  yellow
Asked by 284medb57 to Clare, Glafkos, Paul, Samantha on 12 Mar 2015.
- Paul Booker answered on 12 Mar 2015:
  
  If somebody says strawberries are red and points at one, and you both agree it appears the same colour (whatever that is) to you, then it doesn’t matter what colour you call it, but red will do!
- Glafkos Havariyoun answered on 12 Mar 2015:
  
  We don’t ! I could see a red as a different shade of red than you ! But if you were taught that your yellow (my red) is red then at one point we would disagree with a colour. I would say it’s one thing whereas you would say it is another.
  
  But we can’t prove that we all see the same shades of each colour.
- anon answered on 12 Mar 2015:
  
  In physics red is red it has a defined wave length
  
  But someone can see red differently
- Samantha Terry answered on 12 Mar 2015:
  
  This is a very philosophical question.Indeed, how do you ever know anything is real? There is no way to know for certain, i.e. 100% sure, that your red is my red etc.
- Clare Devery answered on 13 Mar 2015:
  
  The is a definitive red – defined by wavelength…but no way of knowing what other people see!

Question: How do we know that what I see as red is red. If your red is my yellow I have stll been taught that it is red.