Logic circuits generally require at least one capacitor in the range 0.01 to 0.1 uF somewhere relatively near the chips. A conservative designer might place one at every chip. If the 74HC14 is near other properly bypassed chips then it can share one of its capacitors. Often the power supply has capacitors on its output and if the 74HC14 is within a few inches it might share that capacitance.
If the 74HC14 is too distant from all of these other caps, it should have a bypass capacitor.
You certainly can build a 74HC14 circuit with no cap, and it will probably work. My personal preference is to build circuits that always work.