I highly suggest you actually look at studies that analyze this and there should be a good number since amylase is a well defined enzyme. (Bailey K, Hopkins RH, Dolby DE)
Not only that but applying this type of logic to any problem results in bad conclusions and therefore is bad science. (Berkeley)
The process of proving something scientifically is something that follows a somewhat predictable route. I only say that because not everything follows this exact path.
There is usually a nicer looking picture though I cannot seem to find it.
So to answer bluntly, no. You cannot make that conclusion with any stretch of the imagination.
Being that amylases are so well studied you may have your answer after a few google searches, but the case remains that it took many years of research to reliably say so.