Help with a Latin phrase

I need a bit of help on constructing a Latin phrase for a book:

English: 'arguing with a fool proves there are two'

Auto translators provide two different solutions

‘arguendo, cum stultus probat, ibi sunt duo’

or

'adcurrentes salutabant stultus probat, ibi sunt duo'

Are both right, both wrong or is one better than the other?

Thanks

via International Skeptics Forum http://bit.ly/2Kq7AV6