Premise and Conclusion Indicator Words

Words that introduce or appear in an argument premise include:

since (nontemporal meaning) as indicated by because for in that as (noncomparison meaning)

may be inferred from given that seeing that for the reason that inasmuch as owing to

Words that introduce or appear in an argument conclusion include:

therefore wherefore accordingly we may conclude entails that hence thus consequently

we may infer it must be that whence so it follows that implies that as a result

If an argument has no indicators at all, then good English style suggests that the topic sentence of the paragraph is the conclusion of the argument.