The Throwdown

 is a secret achievement/trophy in Deus Ex: Human Revolution.

To achieve this, you must engage Bill Taggart first in the convention speaking hall, and not in the backstage dressing room.

Walkthrough
Use the Confront response against Taggart as your first response to his dirty politics, and then follow-through with the rest of the conversation.

Remember the following when selecting your follow-up answers:
 * Your goal is having Taggart admit his part (or his aid's part) in the Sarif HQ attack.
 * Taggart is a prima-donna, so personal attacks will undermine his confidence in replying, setting you up for your next reply.
 * If Taggart has no information to exploit, his arguments are generally based on his personal ideals.
 * Lastly, you can threaten to give the recording to the reporter or press to test its genuine status, and that will pressure Taggart into telling the truth in public.

An alternative solution is to use "Discredit" as follows: 1. Discredit, 2. Redirect, unless Taggart says "My heart goes out to you" (in which case use Confront), 3. Discredit, unless Taggart mentions that he is a psychologist (in which case use Confront), 4. Discredit. This path has a 100% success rate.

A third alternative would be to do the above until your CASIE augmentation presents itself, then use the pheromones for the alpha type personality.

Another approach is to pay less attention to the CASIE reading and make your choices based on his psychological profile. Such a path involves the following choices: Confront, Discredit, Redirect, Redirect. This alternative does not require the Social Enhancer and will always yield victory to the player.