While striving to define objective truth is a worthwhile activity, objective truth is perhaps only a small corner of the overall possibility space of available truths. There are many cases where objective truth is not available - it may not be feasible, appropriate, practical, or obtainable, whereas subjective truths may be infinitely available.Some examples where objective truth may be lacking include future events, existential truths, and cases where objective truth is generally not available to all humans or specific individual humans. Objective truth may be unavailable in other cases that are beyond values, ethics, morals, and reason, and in phenomena in the qualitative, conceptual, intuitive, aesthetic, and experiential realms.
It could be helpful, therefore, to have rigorous methods for structuring thinking about subjective truth.