Three foreign words

I don't understand why use a complex word when a simple native one would do, ergo I shouldn't use ergo when a simple 'thus', 'therefore', even a simple 'so' would do!

We have robust debates, we look at the facts, there are going to be disagreements. But we just don?t fling out ad hominem attacks like that because it doesn?t help inform the American people

- President Obama

if Britain cannot afford a space programme, then, a fortiori, neither can India

Interesting! All three are latin words