Remember that the data used by Google for the Ngram viewer is data derived from published books, nazimou11. Google doesn't collect data about what people actually say in their conversations. Don't take those graphs too seriously when it comes to questions about the spoken usage of some word or phrase.Thank you for your insight. I thought that believe was used more often in that context in BE.
"Think" means to hold an idea in your mind. Any idea. I can think about flying elephants. There, I just did!Is the word believe used often by Americans? I hear them saying "I think" a lot though. Is there a slight difference between the two words or it's just a preference?