Here's why:
* Irregular verbs are verbs that don't follow the standard rules of conjugation (changing their form based on tense). Examples are "go", "see", "eat", "take", "do", "have". These verbs often have unusual past tense and past participle forms.
* Non-action words (also called stative verbs) describe a state of being, a feeling, or a thought, rather than an action. Examples include "know", "believe", "want", "seem", "love".
Irregular verbs can be action verbs or state verbs.
* Action verbs describe actions: "He went to the store." (action of going)
* State verbs describe states: "I know the answer." (state of knowledge)
While some irregular verbs are commonly used as state verbs (like "know"), others are clearly action verbs (like "go").
In summary: The irregularity of a verb doesn't determine whether it's an action verb or a state verb. It simply means it doesn't follow the regular conjugation rules.