With this image Descartes is trying to show how everyone's view of things can look like a different object or logo. For example from someone else's perspective they might see a company logo, the top of a filled tub of popcorn, or just a cloud. This image is related to irrefutable truths because no matter what everyone will always see a different object, though most might say its a cloud, others might say it looks like something else, so there will always be a doubt over what the image actually is due to perspectives. This relates to existentialism because of how each human will see a different object in this image or any other image. 
Perspectives 

• cloud
• soundcloud logo
• Popcorn
• other company logo's 

Our art represents influence through the triangle on top of the paper. The Big circle represents Marco Antonio Alday as a whole, the smaller circles represent the things that he has influence on. The Rectangle represents his success in life, while the parellel lines portruding out of the recantgle represent his future. The base or the rectangle on the bottom of the paper represents his education and his school. 

Descartes ment with those quote that he doubted his existence and life by thinking. He searched for any evidence to doubt his existence in this world, he never found anything to doubt himself with. This led him to create the quote "I think, therefore I am" which means that he thinks he exists, so he must exist.