For scientific/technical domain stuff you could: 1) look for references to source materials 2) check references quality - is reference real? does the quoted t

For scientific/technical domain stuff you could: 1) look for references to source materials 2) check references quality - is reference real? does the quoted text match the text from the reference? is it an academic paper published in a journal? 3) authorship quality - what is the academic "impact factor" score for the author? 4) confirmed viewer reviews - subjective review by confirmed users 5) accessibility score - automated user interface usability analysis