Re: [rules-dev] BUG: [5.3.0.Final] CollectSetAccumulateFunction should probably use IdentityHashMap internally

There are two types of facts - stated and justified. As explained in the TMS section. Justified facts are ALWAYS equality based, as it's the nature of TMS. The other part of engine for stated facts is customizable and may work in either equality mode or identity mode. Identity mode is default, as it's the most common way java developers expect to work, knowledge based engineers may prefer eqality mode. We do discuss this in the maual.