Full Idea
We may have fairly firm beliefs as to whether or not P is necessary, but many of us find ourselves at a complete loss when wondering whether or not P is necessarily necessary.
Gist of Idea
We may be sure that P is necessary, but is it necessarily necessary?
Source
Joseph Melia (Modality [2003], Ch.2)
Book Reference
Melia,Joseph: 'Modality' [Acumen 2003], p.28
A Reaction
I think it is questions like this which are pushing philosophy back towards some sort of rationalism. See Idea 3651, for example. A regress of necessities would be mad, so necessity must be taken as self-evident (in itself, though maybe not to us).
Related Idea
Idea 3651 Perceiving necessary connections is the essence of reasoning [Bonjour]