If we say yes, we mean yes. Assuming the type of people you want to speak to aren’t too out-there, we can collect many thousands of interviews. If the target audience (or ‘sample’ in researcher speak) is very specific and we can only get a limited number of interviews, maybe think about whether there’s leeway on whose opinions you need, as the more limited the audience, the more costly the research. We’re able to accurately estimate how many we can get as we have lots of experience. If we can’t get them, we will tell you before we start.