HP Prime: The Logic of Purchasing

[Gerald H]

Consider the two statements:

The targeted consumers of the Prime are users in scholastic institutions who will sit exams;

&

Such users require an easily mastered (colloquially intuitive) operating system.

Are the two statements

1 Contradictory, meaning if one is true the other must be false;

2 Contrary, meaning at most one can be true;

3 Sub-contrary, meaning at most one can be false;

4 Equivalent, meaning both have the same truth value?

What I'm angling at is the discrepancy between the justifications of the Prime's limitations & the incredible difficulty of getting the machine to articulate my wishes agreeably.