for the record, no, it can't be done purposefully. i.e. all students of jewish law no inherently the concepts of a priori and posteriori. i.e. many things are prohibited a priori (i.e. to purposefully do), but would be permitted posteriori.

A simple example example is one can't mix milk and meat at all apriori. But if accidentally mixed a small amount of milk into a meat dish (example: one wasn't thinking and took a spoon directly from a milk pot directly into a meat dish), it would be permitted posteriori. But that's only because the act wasn't intentional.