Josh Sawyer, lead developer of Fallout: New Vegas, has clarified how skill-based dialogue options work:
<blockquote>This is how it works. Each skill-based dialogue option has two different texts: one for high skill (which will result in success) and one for low skill (which will result in failure). If you do not meet the required threshold, you see the latter.</blockquote>Thanks, Lexx.
<blockquote>This is how it works. Each skill-based dialogue option has two different texts: one for high skill (which will result in success) and one for low skill (which will result in failure). If you do not meet the required threshold, you see the latter.</blockquote>Thanks, Lexx.