Right the only thing you have to remember is that the deductive argument has certainty.

你们要记住的唯一的事就是，演绎论点有确定性。

youdao

Many of the big trading institutions like Fidelity and Charles Schwab opposed the new rules because they wanted to preserve their right to sacrifice price for certainty of execution.

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And so what you're seeing right now is a lack of certainty about Italy's and Spain's ability to roll over the debt.

WSJ: World Bank President Shares Thoughts on Europe's Debt Crisis