How do you know a word is spelled correctly?

How do you know a word is spelled correctly?

[style]2[/style] [question] [{         'title': 'Which word is correct?',         'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIfJsKjvJXVUHtcGj5TL1NXWBjsexfCLQAoMHq3A8WgGNvsgRyyXGGM17U3tmmNQ26B_JgOLqFDAXkyI4Ql09qbb0Bw439mc41HVxTXpXTAyTopLkwH4sukosS-bFqE0u_M012tCTOHty6s6STMIsQCcBWwhFjm_4kjsbHYKTiDikS5SH13mTWKfjL/s400/1.jpeg",         'answer': [             "Youttube",             "__Youtube",             "Youutube",             "Youtubee"         ]     },     {         'title': 'Which word is correct?',  'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjobwpW1a_5HN_tcV68rSnoDPYOV95yDLmKVJXcfsZzwL01m6ekhnJx_pUrq6r7nWpb85btiWhllniehbQYqgixOLa0HphEN8kr2S9fAVoJgqv1PqAV2Ad5_2CofSZ_Ikl7OrdPBtil_DmL--bo7XNE_B7ivBnW6L5bNcmWAXcDDpBDQH1QKfG0bWQ5/s400/2.jpeg",         'answer': [             "Facebookk",             "Facebok",             "Facbook",             "__Facebook"         ]     },     {         'title': 'Which word is correct?',  'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwmIUbp8t4qxqBqqloI_O_3AroOQuAo32a38synAHrezzP0kTAlJDvQfL31fmIl7bv7jgDhSIxeZybil4nI2934MVTGkGEToLbsOaGVIqObYx9kFCrNVS-KVR0JCcdlcd-Z3ox2FPZo0lwxhZ9Q6bO_IHI8ZXEWot4PaY8GaQhwotpXH-TvTjNCDtN/s400/3.jpeg",         'answer': [             "__Twitter",             "Twiiter",             "Twitterr",             "Twiter"         ]     },     {         'title': 'Which word is correct?',  'image':"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSHrdWVeVvxEAfcOzOdM7yozrMjPUZusDfsqzFg-mUWhLNM2LTu1oCd0HN3HmEPGxfhc0Oq4LJivUgkUdP4elypGguOwVZX9BppR5q-TIcn8-58BgcUfb8d9CLQnegmlH45PF_NzWDgDIcQ12yPg-JFUvm8J2S4SCzevqrluLvn5FOXDfa8qCpKU3b/w400-h267/4.jpeg",         'answer': [             "Tiktook",             "Tittok",             "__Tiktok",             "Titok"         ]     } ] [/question]