Imagine I do the following: I contract a third party company to obtain a license of SAS, and use that license to produce a language specification. Producing a

Imagine I do the following: I contract a third party company to obtain a license of SAS, and use that license to produce a language specification. Producing a language specification surely is not reverse engineering on its own. I could equally well contract the company to undertake a rigorous security analysis of the language to look for vulnerabilities or defects. Neither of these companies needs to know how I'll use what they produce. It seems unreasonable to consider the act of producing documentation about a product's public interface behavior as "reverse engineering". Then, I use the language specification to build my own implementation. Is this permissible? If not, why not? Who is undertaking the act of reverse engineering prohibited by the license?