The danger is, if we're not very frank and strong about this, there will be tit-for-tat arrangements. You get into a situation where it becomes an epidemic.

I'm afraid that if this (national protectionism) takes root it's going to result in tit-for-tat retaliation.

If anyone offends you do not return tit for tat.

We don't want to get into a tit for tat with Iran,

We feel that these should not be tit-for-tat negotiations, this is something everyone should understand. Brazil and others are prepared to make some movement of our own and do everything that is necessary to move forward. This is an important step in the fight against poverty and I believe it is something that we must commit fully to achieving.

It seems like what they're playing is tit for tat. And that's not a good game to play. ... Their argument is weak at best.