The concept of "gunk" in philosophy is the idea that matter is infinitely divisible, meaning that any particle can be further divided into smaller particles ad infinitum. This concept is related to the philosophical question of whether there can be a fundamental smallest unit of matter or if divisibility continues indefinitely.
In the realm of physics, the concept of gunk is not widely accepted or supported by current theories. In fact, our current understanding of particle physics suggests that there are fundamental particles that are not composed of smaller constituents. These fundamental particles, such as quarks and leptons, are considered indivisible and are the building blocks of matter as we currently understand it.
The concept of gunk is more of a philosophical hypothesis or speculation than a scientifically established idea. While it is an interesting concept to explore from a philosophical perspective, physicists generally do not incorporate the concept of gunk into their scientific theories or models.
Regarding the notion of gunk being a "trivial truth" (obviously true), that depends on the philosophical framework and perspective one adopts. Different philosophers may have different views on the matter. However, within the context of current physics, the concept of gunk is not considered a trivial truth, as it goes against the established understanding of fundamental particles and their indivisibility.