2 adjectives to describe solving

But, secondly, as to many of these difficulties, the alleged solving of which is one great proof of the truth of Mr. Darwin's theory, we are compelled to join issue with him on another ground, and deny that he gives us any solution at all.

" "If the signore solves it himself, then I cannot be charged with revealing the truth," was the man's diplomatic reply.

2 adjectives to describe  solving