<div dir="ltr">R' Levine asserted that flour is not real chometz.<div><br></div><div>Just about all flour sold today is washed with water (see for example <a href="http://www.ask.com/question/how-is-flour-made-today">http://www.ask.com/question/how-is-flour-made-today</a>). Since the flour has been exposed to water we are worried that it may have become chometz. Flour used for the baking of matza is specially procured and has not been washed.</div>
<div><br></div><div>R' Levin asked why do some people not sell chometz gamur for Pesach?</div><div><br></div><div>The reason for an individual not to sell chometz gamur is the following. Selling real chometz is a ha'arama on a do'raysa and therefore there are those who hold that it is not permitted. Even if it is permitted why should we actively try to make a ha'arama on a d'oraysa. Therefore, for a private individual who generally does not have a large or valuable amount of chometz it is better to simply get rid of the chometz and not sell it. A store owner on the other hand, would suffer a heavy financial loss if he would not sell his chometz and therefore he is permitted. </div>
<div><br></div><div>With regards to buying chometz after Pesach from a store owner who sold his chametz there are a number of reasons to buy from him even if you don't sell chometz gamur:</div><div>1. If you don't buy from him you will buy from a goy, in other words your chumra will be at the expense of another Jew's parnassa.</div>
<div>2.We pasken that chometz sheavar alav hapesach is only d'rabbanan while owning chometz on Pesach is d'oraysa. Therefore, before Pesach it makes sense to be machmir and not sell chometz gamur to avoid any possibility of violating the issur d'oraysa. However, after Pesach it is only an issur d'rabbanan and therefore at worst sefeka d'rabbana l'kula.</div>
</div>