No, we cannot "validate this on google earth". As far as I am aware there has been no exception to their license that lets us add data using their imagery/maps.

Did you physically go here and verify it wasn't stairs? If so, it can be added, but if google earth is the source then it can't be.

Please see here for more info:
https://wiki.openstreetmap.org/wiki/Google
https://wiki.openstreetmap.org/wiki/FAQ#Why_don't_you_just_use_Google_Maps/whoever_for_your_data?