Trump has lied repeatedly, here are a few examples of his own words:
American Muslims celebrated 9/11 by the thousands - he saw the news reports.
--FALSE, been totally debunked.
China is the big winner in the TPP agreement, and that currency manipulation wasn't part of the agreement.
--FALSE twice, as China isn't a party to the TPP, and currency manipulation is indeed addressed by the TPP.
African-Americans are responsible for the majority of murders of white people in the US.
--FALSE, in fact 80 percent of whites are murdered by whites (any race is most likely to be killed by a member of their own race).
Obama wants to bring in 250,000 Syrian refugees.
--False, more like 10,000.
Syrian refugees are 'flooding' into the US.
--False, there have been around 2000 Syrian refugees resettled in the US, not exactly a flood.
The Federal Government is sending Syrian refugees to states with governors who are 'Republican, not to the Democrats'.
--False, Syrian refugees are going to both Republican and Democrat led states.
There are more, this is too easy.
(If you don't like the sources below, discredit what they're actually saying, using Trump's own words, instead of discrediting the sources themselves)
http://www.motherjones.com/kevin-drum/2015/11/catalog-donald-trumps-divorce-reality
http://www.politifact.com/personalities/donald-trump/statements/
https://www.washingtonpost.com/posteverything/wp/2015/11/23/donald-trump-is-constantly-lying/
LULZ.