Huh, where does it say that?  (Full-text search on this page for 50  only returns this comment thread.)

the global poverty film that advocates for people not to buy fair trade

Since you say "the": Does that exist already? Do you remember the name or how to find it? (A quick googling of mine came up empty.)

Here's another potentially helpful frame you may might want to add to the list of collaborative truth-seeking techniques:

• 'Lose' to Win: Aim to change your own mind, not the other's (within the constraints of rationality/ logic of course). You gain more from the process the more you manage to update your beliefs, with the thankworthy support from your truth-seeking collaborator. Because, assuming hygienic epistemology in the process, your changed beliefs will be based on more – valuable – data/ ideas. (As a bonus, this will make your collaborator happy and improve the bond between the two of you.) You can put this into practice through the technique of steelmanning.

(Steelmanning is already on the technique list:

Be open: orient toward improving the other person’s points to argue against their strongest form

)

Yeah, great article Gleb, very useful topic! Thanks!!

A suggestion° for after reading the article: Asking yourself:
Where and how can you apply this to your life? With which people, in which situations, on what topics does communication tend get duel-y?

You can make trigger-action plans for those situations:
[If I'm talking with my mum and the concepts science and/or esoterism come up] → [then become very mindful and careful re her and my emotions, tone etc. – strive for collaborative truth-seeking instead of arguing.]

° Very much in the spirit of Brienne's cognitive trigger-action plan

[If something feels key to advancing your art as a rationalist] → [stop, drop, and trigger-action plan.]

(“Um, actually …” ;) – tiny math nitpick: The reversal (test) of increasing by 50 % is decreasing by 33 %:
1000 × (1 + 50 %) = 1000 × 150 % = 1500
1500 × (1 – 33 %) = 1500 × 67 % = 1000
)