[Southack]

"In my example, a fossil with no likenesses to a lineage either above or below that could be considered a challenge to evolution, unless tampering cannot be ruled out (see Nebraska Man, and Piltdown Man)."-ThinkPlease

And a living specimen rules out that consideration, how?

[ThinkPlease]

And a living specimen rules out that consideration, how?

Depends, is your living specimen a result of human tampering? Or is it a result of natural environmental selection pressures?