I'm leery about any exegetical machinations that result in scripture being interpreted to mean something that it does not clearly state somewhere itself.

That being the case, you must reject all doctrines that are arrived at by "good and necessary consequence" rather than explicitly stated. Like the tri-unity of God, for example.

"Good and necessary consequence" (borrowing the term from Westminster) is simply a description of deduction:

All normal dogs have four legs. - Explict axiom;
Spot is a normal dog. - Explicitly stated;

Therefore it is necessarily true that Spot has four legs, even though it may not be explictly stated in exactly those words. It nevertheless must be true because of what we know from comparing other facts with each other.

But we're referring to the charismata when we talk about cessation, not to the continuing works of healing sick bodies and minds, or the Lord leading His sheep.