Sylvain Delcomminette

Université Libre de Bruxelles, Belgium

"What is a Platonic definition?"

Julija Tuleikytė

Vilnius University, Lithuania

"What is social reality?"

Cassiano Terra Rodrigues

Technological Institute of Aeronautics, Brazil 

President of the Brazilian Logic Society

"What is a sign ?" 

Caroline Pires Ting

Federal University of Rio de Janeiro, Brazil and Macau International Institute, Macau

"What is beauty ?"

Thomas Adajian

James Madison University, USA

"What is art?"

Otávio Bueno

University of Miami, USA

"What is truth ?"

Fernando Santoro

Federal University of Rio de Janeiro, Brazil

"What is what is it?  ?"

Kevin Timpe

Calvin University, USA

"What is freedom ?"

Francisco César Polcino Milies

University of São Paulo, Brazil

"What is a number ?"

Tatiana Denisova

University of the Aegean, Greece

"What is loneliness ?"

Julio Michael Stern

University of São Paulo, Brazil and Brazilian Academy of Philosophy

"What is a color ?"

André Martins Vilar de Carvalho

Federal University of Rio de Janeiro, Brazil

"What is real ?"

Renato Kinouchi

Federal University of ABC, Brazil

"What is risk ?"

Décio Krause

Federal University of Rio de Janeiro, Brazil and Brazilian Academy of Philosophy

"What is identity ?"