One of the main goals of physical cosmology is to find out the actual
model of the Universe. Current standard model of cosmology, also known
as concordance model, is a spatially flat FLRW Universe consist of
weakly interacting cold dark matter, cosmological constant and baryons
considering power-law form of the primordial perturbation. While we
can use the data to model or reconstruct different characteristics of
the Universe such as its expansion history or the form of the
primordial spectrum, considering the data limitations and its
uncertainties we have to deal with cosmographic degeneracies that
makes it difficult to distinguish between different models. On the
other hand one can use the power of the data to falsify different
aspects of an assumed model using advanced statistical techniques. In
my talk I review these two strategic approaches, 'reconstruction and
falsification', highlighting the importance of each one and how they
are connected; focusing on the concordance model of cosmology and how
we can falsify this model.