  We present several philosophical ideas emerging from the studies of complex
systems. We make a brief introduction to the basic concepts of complex systems,
for then defining "abstraction levels". These are useful for representing
regularities in nature. We define absolute being (observer independent,
infinite) and relative being (observer dependent, finite), and notice the
differences between them. We draw issues on relative causality and absolute
causality among abstraction levels. We also make reflections on determinism. We
reject the search for any absolute truth (because of their infinity), and
promote the idea that all comprehensible truths are relative, since they were
created in finite contexts. This leads us to suggest to search the
less-incompleteness of ideas and contexts instead of their truths.
