C - is an indeterminate value indeterminable?

Question

According to this post an indeterminate value is:

3.17.2
1 indeterminate value
either an unspecified value or a trap representation

Accordi

Answer 1

Two successive reads of an indeterminate value can give two different values. Moreover reading an indeterminate value invokes undefined behavior in case of a trap representation.

In a DR#260, C Committee wrote:

An indeterminate value may be represented by any bit pattern. The C Standard lays down no requirement that two inspections of the bits representing a given value will observe the same bit-pattern only that the observed pattern on each occasion will be a valid representation of the value.

[...] In reaching our response we noted that requiring immutable bit patterns for indeterminate values would reduce optimization opportunities. For example, it would require tracking of the actual bit-patterns of indeterminate values if the memory containing them were paged out. That seems an unnecessary constraint on optimizers with no compensatory benefit to programmers.