You do realize that is an out of context quote.
Pelosi, when asked about unintended consequences of the PPACA, pretty much said that we really will not know what they all are until the bill is implemented, which can not happen until its passed. Unintended consequences are, almost by definition, learned in experience and not always anticipated. Usually a complicated bill has unintended consequences, which are usually addressed in future legislation.
It was a rational statement, when taken in context, but can be fun when parsed or paraphrased. OTH, when you deliberately (or ignorantly) take things out of context so as to misrepresent what is said, then you are wandering into falsehoods, or lies, for short.
The Context Behind Nancy Pelosi?s Famous ?We Have to Pass the Bill? Quote | Mediaite