Invite them to define the word, theory.
If their answer resembles 1 below, feel free to engage them in reasonable discussion, always remembering that "I don't know" is a valid answer to any question.
If their answer resembles 2 below, feel free to dismiss anything they have to say on any scientific topic as they clearly do not understand the fundamentals of how science works.
From Merriam-Webster:
1: the analysis of a set of facts in their relation to one another
2: abstract thought : speculation
If their answer resembles 1 below, feel free to engage them in reasonable discussion, always remembering that "I don't know" is a valid answer to any question.
If their answer resembles 2 below, feel free to dismiss anything they have to say on any scientific topic as they clearly do not understand the fundamentals of how science works.
From Merriam-Webster:
1: the analysis of a set of facts in their relation to one another
2: abstract thought : speculation
Thief and assassin for hire. Member in good standing of the Rogues Guild.
