substantiation       
noun [ U ]  formal uk/səbˌstæn.ʃiˈeɪ.ʃən/ us/səbˌstæn.ʃiˈeɪ.ʃən/
 证实,(为某种说法)提供事实依据
the act of showing something to be true, or of supporting a claim with facts
  The company produced receipts in substantiation of its claim. 该公司出示了证明其索赔的收据。 
 The criticisms were without factual substantiation. 这些批评没有事实依据。 
 See: substantiate
 - More examples
 - He was surprised at the lack of factual substantiation in the report.
 - We have substantiation of every single thing that is said in every ad.
 - There is no scientific substantiation for the assertion that HIV is mutating.