They are both figments our the imagination. Hell is translated from the Hebrew word she'ohl which actually is "the common grave of dead mankind." As for the Roman Catholic Church teaching of purgatory, The New Catholic Encyclopedia acknowledges: "In the final analysis, the Catholic doctrine on purgatory is based on tradition, not Sacred Scripture." Yes, we can learn the truth even from the religion that teaches falsehood. The New Catholic Encyclopedia also tells us the truth about where the teaching of the trinity comes from and it is not from the Sacred Scriptures. We get "accurate knowledge of the truth" from only one source, The Sacred Scriptures known otherwise as the Bible. Jehovah's Witnesses are in obedience to Jesus as they "preach the good news of the kingdom" in some 240 countries. (Matthew 24:14) Jesus said that we are to: "Go therefore, and make disciples of all the nations," and he told us: "And look! I am with you all the days until the conclusion of the system of things." (Matthew 28:19+20) Today more than 10 million people of all nationalities, religious backgrounds and cultures are studying the Bible so as to gain "accurate knowledge." (1Timothy 2:1-4) I invite you to look into the Bible by means of the international website, jw.org and Bible Teachings > Bible Questions Answered. Watch videos that answer our questions truthfully. Watch the video Does God have a Name? (Genesis 22:14; Exodus 6:3; Exodus 17:15; Judges 6:24 and Psalms 83:18) Why did God Create the Earth? (Genesis 1:20-30; Psalms 115;16 and Matthew 5:5) Why did Jesus Die? ( Matthew 20:28; John 3:16 and Romans 5:18) What is God's Kingdom? (Daniel 2:44 and Revelation 11:15) and Why Study the Bible? (Isaiah 48:17+18 and 2Timothy 3:16+17) If you believe what you learned, you can request your free personal Bible study online or from the next witness who knocks on your door or by visiting your neighborhood Kingdom Hall of Jehovah's Witnesses. Thank you for this question.