Theoretically, …

In theory, …

In principle, …

an abstract argument

a model of or for …

According to the model, …

… may be inferred from …

… has a strong theoretical basis

Hypothetically, …

a hypothetical question

to construct a hypothesis

to formulate a hypothesis

The hypothesis can be stated as follows:

A hypothesis could be made that …

… has led to the hypothesis that … is caused by …

a working hypothesis

the underlying hypothesis that …

an alternative hypothesis or proposition that …

a series of hypotheses predicting …

to evaluate the hypothesis that …

to test the hypothesis that …

We tested the hypothesis by …

We are able to refine our hypothesis

to verify a hypothesis

the hypothesis is confirmed by …

… supports the hypothesis that …

… refutes or disproves the hypothesis that …

Possibility

It is entirely possible that …

It is possible that …

One possibility is …

One possible theory is that …

A further possibility is …

Yet another possibility is …

the possibility of …

the likelihood of …

One way of viewing …

It is not inconceivable that …

It is possible to argue that …

a possible explanation for …

It may well be the case that …

It seems likely that …

… more likely

… less likely

… may be associated with …

whether … is attributable to …

There are a number of possible outcomes

Next: Suggestion and speculation

Next