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ipothese:if a et ,,plant,, a image,an information,an human emotion,in my mind,and this image,information or human emotion is real,is made by an alien civilisation,how you check this is truth or is a lie? for example in my mind is a dream with a veeery wonderful woman who look at my ,she smile,and she give my a source very shining,like silver,and two shoes.when she give my this two things , i feel a beautiful feeling. this dream i have when i have 10 or 12 year,and today in my life i don't have in my heart or in my sexual emotions a same feeling like this dream. this dream for my its seams very much in my life.ps.how you check?my opinion is you don't have a tehnology to analise this ipothese, maibe in next 10 or 50 years. good luck us. md.