The term truth has many meanings. If you mean the first one on wikipedia
Truth is most often used to mean being in accord with fact or reality
then it is very much possible to not use that definition at all. In fact, try to taboo the terms truth, existence and reality, and phrase your statements without them, it might be an illuminating exercise. Certainly it worked for Thomas Kuhn, he wrote one of the most influential books on philosophy of science without ever using the concept of truth, except in reference to how others use it.
What kind of claim is the one that one can make accurate predictions of future observations if not a claim of truth?
The term truth has many meanings. If you mean the first one on wikipedia
then it is very much possible to not use that definition at all. In fact, try to taboo the terms truth, existence and reality, and phrase your statements without them, it might be an illuminating exercise. Certainly it worked for Thomas Kuhn, he wrote one of the most influential books on philosophy of science without ever using the concept of truth, except in reference to how others use it.