Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to ...

If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true. (Neil DeGrasse Tyson)

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Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.

Neil DeGrasse Tyson Quotes: If you want to assert a truth, first make sure it's not just an opinion that you desperately want to be true.